A/N: Hey, peoples! This is my first Big Hero 6 fanfiction, but I'll do my best to keep up with it. This is an AU where... Well, you'll just have to see, won't you?

Trapped

[PROLOGUE]

The youngest Hamada had only just left the building when he recognized the disappearance of his neural transmitter. Knowing that it was the key to his microbots and that such thing could be used for terrible things, he quickly told his brother where he was going and rushed back inside.

I'll meet you at that bridge over there!

The thirteen year old hurriedly scrambled up the steps and ran to where his project had been left to be picked up later. Just as he grabbed the headband that controlled the tiny robots, an explosion from across the hall rattled the building. People immediately ran for the exits, pushing and shoving until he had ended up in a corner, trapped.

Terrified, the boy's eyes shifted frantically for an escape. Fire was already consuming the building! Suddenly, the fire caused another project to explode, which led to a chain reaction of explosions. The teen screamed out in fright and covered his head with his arms. The building trembled and quivered with strain- it was going to collapse!

Quickly, he made a dash for the exit. It was then that he noticed his big brother run into the building, shouting his name.

I'm here! Tadashi!

It was then that the fire reached the piping in the corner, which connected to several gas lines. As stupid as it was, most colleges and science labs had them nowadays to provide for the inventors. Misty, brown eyes widened.

He was going to have to choose between himself and his brother.

Without a second thought, he shoved the neural transmitter on his head and directed his microbots, running towards the corner again. Not a second after they formed a protective covering around his brother, the fire engulfed the gas lines, and the building exploded outwards.

Goodbye, Tadashi...

The young inventor watched in dismay as the roof collapsed inward, heading straight for him.