Davis and the others were chilling out at a park.
"Finally a chance to relax." T.K. said.
"Hey where's Tai?" Davis said.
"He just wanted some time to himself." Kari said, then they heard children scream and saw what looked like a lizard woman. She used telekinetic powers to lift Davis.
"The omnitrix, where did you get it." The woman said.
"That's a long story." Davis said as he transformed to Meramon.
"It doesn't matter because you're not getting it." Meramon said.
"Magma Blast." Meramon said and blasted her, but she was gone.
"Where'd she go?" Meramon said. She was flying and blasted him with water from a fountain.
"Davis are you okay?" Kari said.
"I'm soaked here." Meramon said. The lizard woman got blasted and they saw Tai in a plumber suit.
"That was your only warning shot." Tai said.
"That voice, Tai." The lizard woman said.
"Zena!" Tai said.
"They seem to know each other." T.K. said.
….
Camp Site
Tai brought his mystery friend Zena back to camp with the others and having dinner.
"She's been here for a few hours and hasn't said a thing to us." Davis said.
"They're just getting reacquainted." Kari said.
"So how do you guys know each other?" T.K. said.
"Zena and I were in the same class back when I was a plumber." Tai said.
"You even told me all about those digimon." Zena said.
"So what brings you back to earth?" Tai said.
"That." Zena said pointing to the omnitrix.
"I knew she's just like the rest, she's only interested in the omnitrix." Davis said.
"Zena that's not true." Tai said.
"Well why wouldn't I be interested, I'm the one who sent it to earth." Zena said and that had them interested. "I was transporting the omnitrix when I was attacked by our old friend Diaboromon. Knowing I couldn't keep it safe I placed it in a pod and transported it down to earth and my escape pod when another direction and I was put in a hibernated state."
"Well Diaboromon's no longer a problem thanks to Davis." Tai said.
"Oh Tai you're too modest for your work." Zena said.
"So since Diaboromon's no longer around you don't need to stay here." Davis said.
"Davis that's not nice." Tai said. Zena got out a device that sent a sonic wave.
"My transportation will be here soon." Zena said.
"Would guys clean up Zena and I like to talk." Tai said and they walked off.
"I don't like her." Davis said.
"Really." T.K. said sarcastically.
"Remember what happened with Phillip, I think I'm going to check it out." Davis said and took off. Tai and Zena were walking remembering the good times.
"I have to say it's nice to see you again." Tai said.
"Yes it has been so long." Zena said Davis was Shurimon and cloaking himself.
"Anymore of this and I'm gonna hurl." Shurimon said.
"With Diaboromon gone there's nothing keeping you here. What do you say you come with me." Zena said.
"Another tempting offer." Tai said.
"No way." Shurimon said and went back with the others.
"What's going on with Zena and Tai?" Kari said.
"Should have kicked her butt back into outer space." Davis said.
"Tai seems to like her, why not give her a chance." T.K. said.
"No way." Davis and a robot that looked like it belong to Diaboromon.
"Isn't that one of Diaboromon's robots." Kari said.
"I know what it wants." Davis said and ran at him. "You want this." Referring to the omnitrix. The robot fired missiles and out came Machgaogamon.
"You have to take it from me." Machgaogamon said. He started bashing the robot left and right with Tai and Zena arrived.
"Howling Cannon." Machgaogamon blasted the robot back to the R.V. Cables started coming out and it was taking pieces off.
"It's taking over the R.V." T.K. said.
"Zena removed the fuel tank." Tai said. Zena used her telekinetic powers to remove the fuel tank blasted it with it exploding. "We still make a great team." Machgaogamon got back in and started beating the robot down and had it skyrocket from an uppercut.
"Sorry about the R.V. Tai." Machgaogamon said.
"I just hope my parents can afford a wreck rental." Tai said. They were trying to repair the R.V.
"So that thing has been around this whole time." Kari said.
"It must have came down along with me and this one can take other mechanical pieces and add it to its self. You are sure the mega droid was destroyed." Zena said to Andromon.
"Yes I'm sure the mega droid was destroyed." Andromon said.
"Davis I don't mean to sound ungrateful, but maybe Kurisarimon would have been better for this." Tai said.
"A child such as him wouldn't even know how to use that form in this case." Zena said.
"I heard that. If I'm such a screw up then why did you send the watch to me in the first place?" Andromon said.
"I didn't send it to you. You found the omnitrix before it could reach the real owner." Zena said.
"What!?" Andromon said.
"The pod malfunction and you were around where it did crash." Zena said.
"I got the watch by mistake." Andromon said and the watch timed out with Kari placingher hand on his shoulder.
"Of course, you didn't think I was sending the most powerful device in the universe to any mere human. I was sending it to Tai." Zena said.
"Guess that would make sense with Tai being a plumber." T.K. said.
"Oh fine, take it back and you two can cruise around the universe." Davis said and ran off. "See if I care."
"Davis! T.K., Kari could you get him." Tai said and they went after him.
"Did I say something wrong?" Zena said. Davis was moping by a cliff and Kari and T.K. showed up.
"Leave me alone." Davis said.
"So the watch wasn't for you, you seem to do better with it than Tai could have." Kari said.
"It's not just that." Davis said.
"Then what is it?" T.K. said.
"Don't you get it? She wants Tai to go away with her just like before only this time there's nothing keeping him here." Davis said. Tai and Zena were still on repairs.
"Zena you need to understand Davis loves the omnitrix and telling him it wasn't meant for him hurt him. It wasn't really what you said it was how you said it and it was harsh. It was like you were trying to hurt his feelings." Tai said.
"I'm sorry Tai. I must admit these earth customs are strange to me. On my planet once you hatch you're on your own." Zena said. Then the robot attacked and it was bigger with parts that looked like a jeep. "The mega droid." It used a tire to knock away Zena and was knocked out. He launched his cables and got a hold of Tai. When the others got back they saw it had Tai.
"No!" Davis shouted and it got away. "Tai!" They made it to Zena and she was waking up.
"You said you trashed that thing." T.K. said.
"We all thought it was destroy." Zena said.
"Wait if that thing wants the omnitrix, why did it kidnapped Tai?" Kari said.
"Because it knows I'll come rescue him, it's a trap." Davis said.
"Indeed which is why we need to move fast. It's collecting more parts for a final battle. Where would the mega droid have the most access for artillery?" Zena said.
"The docks." Davis said.
…..
The Docks
Davis was riding on the hover disk he had from those three with the giant tick. The droid was gathering pieces from a tank and Davis saw Tai.
"Davis stay back, this thing has control of the nanotech in my suit." Tai said with lasers being fired. "You have to take this thing down, even if that means taking me with it."
"Sorry Tai, not an option. Is this what you want, I'll give it to you for Tai." Davis said.
"Davis don't." Tai said.
"We know what we're doing." Davis said.
"We?" Tai said. Zena threw some things at the robot and Kari fired an energy beam. T.K. removed a crate and a bunch fell on top." The robot started firing at all of them. Kari and T.K. were keeping it busy while Zena regrouped with Davis.
"We need to destroy the original mega droid." Zena said.
"Sounds like a job for Kurisarimon." Davis said.
"I have a better idea, but you must trust me." Zena said. She had him transformed into Kiwimon with the watch on his left side.
"What's this thing suppose to do?" Kiwimon said.
"You're going to spit at it literally, that's your power." Zena said.
"Well I do feel something in my throat." Kiwimon said and shot out a Chibikiwimon. Kiwimon jumped on top of the droid.
"Nose Mattock." Kiwimon said and pluck his beak at all the pieces and had them fall off.
"I'll get Tai. Let go of him." Zena said. Kiwimon shot the top part off.
"Now to really dig in." Kiwimon said.
"Pummel Peck." He shot chibikiwimon inside the robot and it fell apart.
"Way to go Davis." Tai said.
…
The Camp
"I want to apologize for how I acted. I guess I didn't know if I could really trust you." Davis said.
"And I'm sorry for saying you weren't suppose to have the omnitrix, you've done good with it." Zena said with her ship coming down.
"Guess we should let Tai say goodbye." T.K. said.
"But to who?" Davis said.
"You're not coming are you Tai." Zena said.
"It's a big universe, but right now those guys, my other friends, my family needs me." Tai said. Zena then kissed him with the others grossed out and she left.
"We thought we were going to lose you Tai." Davis said.
"You can't get rid of me that easily. Let's hit the road." Tai said with Davis and T.K. running in.
"I thought you had a thing for Mimi after Sora chose to date Matt." Kari said.
"Zena's nice and all, but I don't see myself with a lizard and we're from two different worlds." Tai said with a chuckle and Kari gave him a hug for him staying.