Ana, a young Spanish woman who has just been dumped by her boyfriend, and her brother Tono, receive a call from their father to tell him that he is getting married in Mexico to a woman he met on the Internet. When they get there, they discover that the girl is 30 years younger than her father and they begin to live with her new in-laws, with the inevitable cultural clashes that this will entail.

Four childhood friends decide to play a prank on an aunt of one of the four. Two enter the house and two others remain waiting in the car. When the alarm goes off, the two waiting in the car escape, leaving the other two to escape on their own. After that, the friends begin distrusting each other wondering what really happened during those three minutes in the dark inside the house.