A soldier from the 15th century, a university student from the 19th century and a nurse from the present join the secret 'Department of Time', a secret department within the Spanish government with the ability to travel through time. Their mission is prevent changes in history.
When Paula leaves her mate Pedro, he misses her and looks for comfort with his best friends, Javier and Sonia. Paula is having an affair with Javier. Pedro tries to find who is the secret lover of Paula, and hires a private eye. Meanwhile, while comforting Pedro, Sonia has a one night stand with him and Javier thinks she is cheating on him with her lesbian friend Luzia.
Mommy's boy Juantxo is engaged. Dragged to the party by his friends Konradin and Paco, he loses his expensive wedding ring inside the body of a prostitute. Mafioso whorehouse owner Villambrosa finds the ring. Meanwhile Villambrosa's rival gangster Souza sends femme fatale Fatima to check things out. Juantxo and his friends are trying to get the ring back and in the process get involved in the war between gangs.
