Twenty years after fleeing to Brazil, following his involvement in a robbery, a mobster sends his son to Italy to get important documents from a safe deposit box. Soon after the young man collects the documents he is killed. Inspector Davide Rivera and his team are called in to investigate the murder.

When a talented young athlete dies while competing in a swimming championship, everyone is shocked that his death was caused by a reaction to ephedrine, an illegal substance. Inspector Rivera and his team are called in to find out if the young swimmer took the substance of his own accord or whether he was the victim of foul play.