In Rio de Janeiro, scientist and physics professor João "Zero" Henrique is doing research an alternative source of power. His wealthy friend, has sponsored his research and his best friend Otávio's helped him.Zero's been a bitter and frustrated since he was humiliated in public by his sweetheart Helena. One day, Zero decides to test his time machine and he accidentally travels to 22 November 1991, the day which changed his life with the embarrassment in public.—Claudio Carvalho, Rio de Janeiro, Brazil