Earth has been at peace for many years since Majin Buu was defeated and no other threats on her life have surfaced. The Z Fighters have gone their separate ways. Goku and Gohan have been living in Uub's village. Goku has been training Uub as Gohan is educating the other villagers. Vegeta is training in space and Piccolo is visiting New Namek. Krillin is a police officer in South City and Tien stays secluded in the mountains. Trunks and Goten went off to different schools to earn degrees.
The only two who have the capability to fight are Vegeta's daughter Bulla and Goku's granddaughter Pan. The two of them had become friends as they were growing up due to the closeness of their families and spend a good amount of time together. For the early years of her life Bulla, was characterized as a girlie girl and was more like her mother Bulma. But as she watched her father and brother fight in the World Tournaments, she wanted to be more like them.
It was even joked that since Bulla who acted more like her father and wanted to train like him, was often called "The Princess of all Saiyans". Pan on the other hand had become a tomboy early on and always begged to be trained how to fight. Since Goku and Gohan had been busy with Uub's village for half her life, she didn't get much in the form of training. She was able to get her Uncle, Goten to show her some things during summer breaks.
But when it came time for him to go away to school, she was left with no one to train with. Bulla also had some training during the summer with her brother Trunks. And as the same with Goten, he too went away for school and left no one to train with Bulla. While spending an afternoon together on the grounds of the Capsule Corporation, they discussed their training woes.
"So since Uncle Goten went to college I've had no one to train with." Pan said.
"Yeah same here, Trunks also went away to college. I wish there was a way we could train." Bulla said.
"Wait what about Vegeta?"
"My father? No way. I've asked him a million times already, and every time he tells me no. He never gives me an explanation why. Besides, he's off in space by himself training."
"Well, how about we train together. I mean we know a little bit and I'm sure we could figure it out and become much stronger."
"I do like that idea, but I don't know."
"Come on Bulla, don't you wanna be like Vegeta?"
"Well, yeah I do but…"
"Besides do you want to be one of the first female Super Saiyans?"
Bulla's eyes widened at the thought and a big smile spread across her face.
"That would be awesome and you could do it too, and we'd be sisters in battle."
"So what do ya say, train together?"
"You got it Pan."
As the two began to discuss how strong they were going to become, a sudden shake of the ground caused them to freeze. They both could tell something was wrong as the shaking got worse. Bulma came running outside and towards the two girls.
"Hey are you two alright?" Bulma shouted over the rumbling.
"Yeah Mom, it's just a little shaking, that's all." Bulla said.
"You girls should come inside where it's…" Bulma said as she tumbled to the ground.
The shaking became violent and parts of the ground opened up and trees freed themselves from the soil.
"What on Earth is going on?!" Bulma shouted not being able to move.
Bulla and Pan gripped a nearby picnic table and held on for their lives. As the Earth felt like was going to rip itself apart, the tremors stopped and everything was peaceful again. As they composed themselves and looked around, they froze. An army several hundred strong stood before them. Every member stood perfectly still, their eyes piercing. Bulla and Pan had no clue what to do.
As they frantically tried to think of something, an object began to float over the heads of the soldiers coming towards them. As it reached the front, a now visible video monitor hovered towards the girls and stopped near them. It flickered on and a face came on with a very sneer smile.
"Greetings and salutations Earthlings." The being on screen said.
Pan gritted her teeth knowing this guy was going to be trouble.
"I'm sure you are all confused so allow me to explain. My name in Tantis and I am known as a Planet Trader." the being on screen said.
Tantis was an alien being who had a very human shape while a grayish skin tone.
"So what are you doing here Tantis?" Pan asked.
"It's quite simple. My army here is going to kill all life on this planet and trade it off for its recourses."
"What, you can't do that." Bulla said.
"Oh. But I can…and will."
"You're horrible, you're just like Frieza." Bulma said.
"Where do you think he got his passion for destruction? I taught Frieza everything he knows. I am surprised that he hasn't taken over this planet yet."
"He's dead that's why." Pan said.
"What? How's that possible?"
"My Grandpa Goku defeated him on Planet Namek."
"I heard that planet exploded by Frieza's hands but he survived."
"Yeah that's true, but when he made his way here my brother Trunks was waiting for him and killed him as soon as he arrived." Bulla said.
"How could the mighty Frieza be destroyed?"
"Because, my son is a Super Saiyan, that's why." Bulma said.
"Super Saiyan? That's just a legend."
"Well it is real buster, and once my husband and son hear about this you will regret ever thinking about coming here." Bulma said as she began to use a communicator she pulled from her pocket.
"Stop her!" Tantis yelled
One of his soldiers rushed forward and grabbed Bulma's arm.
"What are you doing? Get off of me!" Bulma yelled.
Bulla's anger jumped seeing her mother in trouble and rushed to save her.
"Leave her alone!" Bulla yelled trying to hit the soldier.
Not being quick enough, the solider saw her coming and grabbed her fist dead in her tracks. Bulla tried to free herself but his grip was too strong.
"Get rid of this one and destroy that communicator." Tantis instructed.
The soldier nodded and began to squeeze Bulla's hand in his own. Bulla screeched out in pain and her hand was just short of being crushed. He left go of her hand and she fell to her knees clutching her hand in the other. The soldier then kicked her hard enough to send her flying. Pan rushed and grabbed her friend. The soldier then grabbed the communicator from Bulma's hand and crushed it.
After dropping Bulma to the ground, the soldier walked back to his place in line.
"Alright, now that's over with. I will now start with my preparations. First I will server any and all communications on this planet." Tantis said.
As he finished, another one of his soldiers pulled out a device that size of a small TV and held it up in the air. The device began to flash and float into the air. It began to emit electric pulses that extended everywhere even into the atmosphere. One after another telephone transformers exploded rendering phone communications useless. The sky began to light up as satellites exploded as the transformers did.
The flaming wreckage entered the planets gravitational pull and started to plummet to the surface. Satellites the size of semi trucks and larger smashed into the Earth.
"And now to prevent anyone from leaving as well as any interference…" Tantis said as yet another soldier using another device, typed a command on it and a barrier encompassed the entire planet.
"Perfect, now with preparations now completed, I give you two Earth days until my army sets out and extinguish every life on this rock. Enjoy your last days as a race and farewell." Tantis said, then his face disappearing from the monitor.
It then floated back from where it came. Tantis' army marched away leaving nothing but their destruction behind. Bulma ran to her daughter who still clutched her hand in pain.
"Bulla are you okay?" Bulma asked.
"Yeah, I don't think he broke anything it just hurts." Bulla said.
"Let me get you some bandages, Pan you stay with her." Bulma said as she ran inside.
Pan began to think about the situation and what should they do.
"This is bad. I wish Grandpa or Papa were here, they could stop this Tantis guy." Pan said.
"Yeah, my dad could destroy him with no effort. But he's destroyed all communications and even put up a barrier around the entire planet so anyone who could fight is unreachable or can't get here." Bulla said.
Pan thought about what Bulla said and an idea popped into her head.
"You're right Bulla there is no one else, just us. With that being said the two of us should take Tantis down." Pan said.
"What are you crazy? You saw what that soldier did to me. There is no way we can beat them." Bulla said still in pain.
"Well we can train just like we were just talking about before."
"Pan, he said we have two days. Do you think we could train enough in two days?"
"Well no not into two Earth days. But there is a way to train for a lot longer than that in the same amount of time."
"What are you talking about?"
"Didn't Trunks or Vegeta tell you about the Hyperbolic Time Chamber?"
"Well, I've heard about it."
"The Hyperbolic Time Chamber is a room at The Lookout high above the Earth that leads to a different dimension where time moves slower. My dad and Grandpa Goku once trained in there for a full year inside but only one day had gone by on the outside."
"Whoa, really? But do you think we can get strong enough even in that time?"
"Of course. I'm Goku's Granddaughter and your Vegeta's daughter right?"
"Yeah you're right. Alright let's do it. But I think we shouldn't let anyone know, I know how my mom gets and she wouldn't let me go"
"Yeah you're right, I know Grandma Chi-Chi would throw a fit if I told her I was going to train like Grandpa."
"So do you know where this place is?" Bulla asked.
"Yeah, Grandpa took me there when I was little."
"It's not going take long to get there is it?"
"Well it's halfway around the world."
"It's that far? It's going to take at least a day to get there."
"Bulla relax, I can get us there in a few seconds."
"A few seconds, how?"
"Just put your hand on my shoulder and let me do the rest."
Bulla obliged and placed her hand on Pan's shoulder. Pan then placed her two fingers to her forehead and searched for The Lookout. She focused onto a certain feline that she wanted to take to Bulla to first and the two began to disappear and reappear at Korin's Tower.
"Is this the Lookout?" Bull asked as she looked around.
"Sort of, we are at Korin's, just below the Lookout." Pan said.
Pan looked around, not seeing anyone she called out.
Hey Korin!" she shouted.
"Hey who's ever yelling can knock it off, I'm trying sleep here." A rough and annoyed voice said.
"Is there anyone there?" Pan asked.
"Of course you dummy, I am." The voice said.
From behind one of the pillars came a short rotund man with a sword hilted at his waist.
"Are you Korin?" Bulla asked.
"Do I look like a talking cat?" the man said.
"Talking cat?" Bulla said completely confused.
"No, he's Yajirobi. I'm Korin." said another voice.
Out from one of the rooms came a short white cat carrying a wooden stick. Bulla's eyes widened as she saw Korin walked towards her.
"Hi Korin, it's me Pan." Pan said with a big smile.
"Pan? Gohan's daughter? I haven't seen you in years." Korin said.
"I know, Mama got angry when Grandpa Goku took me here to climb the tower."
"I remember that day, you climbed it faster that Goku did." Korin said.
"Yeah but it was nothing special." Pan said modestly.
"You were three years old. I think that qualifies." Korin said.
"Pan is he serious, did you really climb all the way up here when you were three?" Bulla said shocked.
"Yeah, it was fun. It was like a jungle-gym times a million." Pan said then laughing.
Bulla looked at her friend and realized how much potential she had. She thought that if Pan could do that then she could too and she wasn't going to second guess herself while she trained.
"I'm glad to see you again Pan, and who is this you brought with you?" Korin said.
"This is Bulla, Vegeta's daughter." Pan said.
Korin and Yajirobi swallowed hard.
"Did you say she was Vegeta's daughter? Korin asked.
"Sure did. The two of us came up here to train in the Hyperbolic Time Chamber so we can defeat Tantis." Pan said.
"Oh yeah him. I saw that whole thing from up here. He's not playing around." Korin said.
"No he's not. We're gonna train for both days so when he gets here we can defeat him." Pan said.
"Two days? That's a total of two years of training." Korin said shocked.
"I know, if we work hard the two of us can stop Tantis and save the world." Pan said.
"Well both of your father's help save the world of numerous occasions so I believe you two can do it. Just do me a favor and be careful. I don't want Vegeta coming up here in a rage and blowing the whole place up." Korin said.
"You got it Korin. By the way can we get a few Senzu beans, ya know for an emergency." Pan asked.
"Sure, I'll even give you an extra one for your hand." Korin said handing a bag of Senzu beans to Pan and giving one to Bulla.
"What's this?" Bulla asked examining the green bean in her hand.
"It's a Senzu bean. If you eat it not only will it heal your hand it will replenish your energy." Pan said.
"You expect me to believe this bean can do that?" Bulla said.
"Yeah. I know it doesn't make sense, but trust me."
"Fine but when this bean doesn't do anything, I'm going to chase you around this place."
"Just eat it." Pan said.
Bulla placed the bean in her mouth and bit into it and swallowed. She began to feel a tingle in her hand and as she held it up and looked at it, it slowly stopped hurting and the redness went away. She was amazed that her hand was now fully healed and her energy fully replenished.
"Wow that worked, that actually worked." Bulla said still amazed.
"I know it did. Know let's go train. See ya Korin and thanks." Pan said as she teleported them to the top of the Lookout.