Reve and his sister Mi are alone in the world - their father is dead and their mother has abandoned them. Reve has to learn to be a man - to fight, to fish, to live. He must protect Mi from the rest of the world; she is special, hears voices, can see things. She can call down thunder. Travelling to the big city to search for their mother, Reve and Mi get sucked into the squalid underworld of the sprawling favela, where danger lurks around every corner, and every day is a fight for survival.