This film is based on the true story of the Catalan lawyer and engineer Narcís Monturiol i Estarriol (Figueres 1819 - Barcelona 1885) who invented the submarine.

Ignacio (Unax Ugalde), a student of arquitectuara with a stable life, for more than six years since he sees his troubled older brother, Carlos (Tristan Ulloa). When the two are reunited, Ignacio learns that Carlos has a gambling problem, so he decides to try to help, even putting his life in danger, before leaving with a scholarship that has managed to go to study in Los Angeles.

Quima goes to say goodbye to her best friend, who has died. During the bus ride to the morgue, she opens her heart to a stranger and with him she relieves the pain she has accumulated.

She wanted to be rich, to have lovers, to go to Barcelona: but Montserrateta had to make do with living in a village in the Pyrenees, with her boyfriend, and milking cows on her parents' farm, until one day, she finds a lottery ticket.

With her family and wealth in shambles, Teresa marries the much older Nicolás, a man with morbid obsessions. Soon after, Nicolás soon dies, leaving Teresa with his fortune. However, Teresa begins to acquire the same personality and morbid obsessions as her late husband.