Aldo Bianchi, a former Argentine revolutionary now living in Italy, travels to Havana, where he meets the beautiful Bini, a sultry student working the hotels with great charm and panache. Bianchi soon discovers through his liaison with Bini that his nemesis, the Uruguayan military torturer Alberto Rios, is living under a false identity in Cuba. Putting his tropical holiday on hold, Bianchi goes on the hunt for his sadistic enemy.