Twin brothers Tristan and Lazaro are best friends and both train for the admissions test to the Astronaut Academy for a military program for the colonization of space.

One night, during a training session, Tristan is contaminated with a mysterious toxic liquid. This affects his body and psyche: he becomes tremendously huge and physically strong, but very weak mentally. The accident destroys the bonds between the brothers and each twin must fight on alone. Lazaro has to learn to forget the old image of his brother and love him as he is now, although the world has no place for monsters like Tristan…