Three old schoolmates, who in their time as students had formed a kind of secret society called The Black Hand, in order to embitter teachers' lives, meet again years later with very different lives. One is a dad's son who is distracted as best he can; another has become a writer of espionage novels and is persecuted by the CIA, and the third leads an indolent life without further ado. The reunion of the three friends will make the society of La Mano Negra revive.

Bernabe (José Sacristán) works as an artistic director for a publicity firm but his avocation is fawning after his bosses, sleeping with whomever might advance his career, and ignoring his wife. Life continues on in this vein until he meets a young model whom he invites up to his boss's temporarily vacant country house, pretending the house belongs to him. Not very far away, bulldozers and other machinery are clearing the beautifully wooded area so construction can start on an amusement park. Little does Bernabe realize that his potential new conquest is a seriously fanatical environmental advocate, and she arrives at the house with friends, gets Bernabe high and "out of it," and then she and her friends proceed to trash the construction machinery. Once Bernabe comes around again, he finds out what has happened, loses heart for his planned sexual escapade, and begins to appreciate his wife for the first time.