When the weekend came, Hiro groaned. As she eat, her arms burn. Her arms are sore and she couldn't get to the top. Even all of her friends are tired too and they still couldn't reach the top, besides GoGo sine he's the captain. The only good thing about this hour was training was over for the rest of the day and Hiro could just go to sleep and rest. Baymax nudged his head against hers. Hiro smiled and petted the demon cat, but Baymax was pointing his head at her necklace. For the last five days, Baymax was pointing to Tadashi's necklace for some reason and she doesn't know why.

"I never thought this training would be so hard!" Fred groaned.

"Yeah no kidding." Wasabi muttered.

"Wish training was easier." Honey-Lemon sighed.

"You said it." Hiro agreed.

"Hiro!" A voice called.

Hiro turned and saw GoGo walking up to her. She stared at him blankly. Why does he still have his kimono off? Hiro was glad she got used to the whole GoGo is shirtless thing. That way she won't even blush whenever she sees him like that. GoGo sat down next to her, putting a scroll next to her. Hiro frowned and held the scroll. As she opened it, read it, and blinked.

"This is a scroll about demon cats." GoGo explained. "I thought you might want to train Baymax."

Hiro smiled. "Thanks, Captain!"

"You don't have to call me Captain all the time," GoGo pointed out. "When we're not training, just call me GoGo."

Hiro nodded. "Okay Capt-I mean GoGo."

GoGo patted her back and left the dining hall. Hiro smiled a bit and twirled her hair, but she stopped and cleared her throat. That was a bit girlish thing to do. She should watched herself if she does anything not masculine. Then Baymax raised his head up, twitching his ears. He stood up and started running off. Hiro blinked and gasped as she dashed after Baymax.

"Baymax!" Hiro called, but Baymax didn't stopped.

As Baymax raced out of the dining hall, Hiro leaped at Baymax, but he jumped away, causing her to crash on her face. Hiro growled as she got up, wiping the dirt off of her face. She ran towards Baymax as he ran out of the gate. Along the way, Hiro grabbed a rope so she could use it as a leash. Baymax ran into the forest. Hiro tried to keep up to him, but it seems the little fluff ball is getting deeper into the forest. She's not sure what just got into Baymax, but he's acting a bit odd for some reason. As Baymax disappeared into the forest, Hiro bit her lip. This is bad. Baymax was Tadashi's pet and if she lot him, she's not going to forgive herself. Baymax is the only thing left she has of Tadashi. Hiro brushed the leaves out of the way. She tried to see Baymax, but she couldn't see his little white fur. Tears formed into her eyes. She couldn't loose him. She just can't. Baymax can't be gone for good.

Suddenly, Hiro heard a meowing sound. Hiro's eyes lit up. She pushed the leaves away as she ran closer. The meowing grows louder and louder and finally, Hiro got out from the leaves. Baymax was there. Hiro scooped Baymax into her arms, hugging him tightly. She thought she'll loose him forever. Then Hiro paused. She glanced up and her eyes widened. In front of them was a dark house. Hiro frowned. This doesn't looked like a store. It looked like someone is living here.

Hiro and Baymax stared at each other. They walked up to the door and Hiro knocked. Waiting, no one answered. Hiro stared up at the house. There is an open window. She went to the nearest pillar and began to climb up, while Baymax was sitting on her shoulder. When they got to the top, Hiro slipped inside. Hiro pursed her lips. It's dark inside. Too dark.

"Nyaaaan!" Baymax yawned.

"Shh!" Hiro hissed.

Hiro glanced around to from left to right. She sighed. No one seemed to hear Baymax's yawn. Baymax jumped off of her shoulder, jumping down the stairs. Hiro scooped Baymax up as they walked down the stairs. Hiro stared at the house. This doesn't look like an inside of a house. This house doesn't have anything, except darkness. In the corner of her eyes, Hiro noticed some light in the corner of the house. Gulping, Hiro hesitantly walked over to the corner, but before they could turn to the corner, Hiro noticed a broom next to her and grabbed it as a weapon. With a deep breath, Hiro and Baymax stepped out of the corner. Hiro raised a brow. There's no one here. There's only a desk and a lantern turned on. Above the desk was papers and maps all over it.

As Hiro got closer to the wall, her eyes widened. There was a map of San Fransokyo where the Emperor's Palace was circled, including Kyomento. Hiro took some of the papers and read them. Gasping, she dropped it and fell onto her knees. The papers were about planning to burn the gates of Kyomento and explode it, where Tadashi died. Hiro clenched her fists. She couldn't believe it. She always thought the explosion wasn't part of the raid's plan, but it was all along. Tadashi...died for nothing! The person who was responsible for his death was someone in those papers called Yokai and next to his name was a picture of a mask.

Then Baymax hissed. Hiro glanced up and gaped. Above from them was a man dressed in black with a white mask and with him were ninjas. Is this the Yokai person? In the corner of Hiro's eyes, there are other masked people, but unlike Yokai, they are wearing black masked. Right away, Hiro grabbed Baymax and raced off. All of the ninjas raced after her. Hiro ran as fast as she could, but they're catching up to her. When they got to the door, Hiro put Baymax down.

"Change, change, change!" Hiro ordered.

Baymax changed right away, but this time, his larger cat form was like his kitten form.

"Scratch it!" Hiro yelled. Baymax scratched the door, but there was barley a mark. "Use headbutt!" Baymax bumped his head at the door and nothing happened.

Hiro groaned with frustration. How is she going to get out? She pushed Baymax up the stairs, while ninjas were still coming after them. As Hiro slammed Baymax out of the window, she came out with him. Hiro screamed, but Baymax landed on four paws and she landed on his back. Baymax started to run, while Hiro blinked a few times. They jumped out of the window and Baymax catch her fall. They jumped out of the window!

Sighing, Hiro glanced back. There are no ninjas coming after them. She placed her hands on her hand, burying her face into Baymax's fur. She couldn't believe it. For all of this time, she thought the explosion just came out of nowhere, but instead it was planned. Then Hiro remembered something. After the guards came out with Tadashi's burnt body, the person he was trying to save wasn't there. Tadashi was murdered and tricked to his death. What if that Yokai man was the person who killed Tadashi? The question is: Who is he?