Psychologist Martín Rivera is one day invited for a coffee by a stranger named José Sagasti, who informs him that his grandfather had made a pact with his boss, "The Devil", who he did not comply. Therefore Rivera, as his only male descendant, becomes the guarantee of said commitment. Martín and his closest ones start to be intensively harassed by Sagasti, until the pact can be finally fulfilled.

A Year at the Top is an American sitcom which aired for five episodes on CBS in 1977. Produced by T.A.T. Communications Company, the series was created by Heywood Kling and co-executive produced by Don Kirshner and Norman Lear.

Music producer and composer Ha Rib made a contract with the devil to trade his soul for fame. This devilish transaction brought him all the fame he could ask for, producing many hit songs. As the contract expiration draws near, he bargains with the devil for an extension. For that, he must find another person to sell the soul. Ha Rib finds a perfect candidate, but contemplates because she would have to suffer for 10 years for his selfish fame.

Young psychologist Martín Mondragón is contacted by a mysterious man named José Sagasti, who tries to collect an old debt that Martin's grandfather left when he died. Rivera, being the first male descendant, is the most suited guarantor to pay off the debt, which consists in giving his soul to the devil by dropping a bit of blood from an old parchment.

When a new, mysterious student moves into a boarding school surrounded by a deep, dark forest, long-time students must face their inner darkness and darkness that arose a long time ago before their souls are sacrificed to the devil.