Two sisters with very different lives have decidedly different attitudes when they learn of the possible whereabouts of their long-lost mother. Angela (Aitana Sanchez-Gijon) is a female police officer who patrols the slums of Barcelona with her partner, Fermin (Santiago Ramos), while Angela's younger sister, Laura (Barbara Goenaga), is a trouble maker and a loner, though her friend Oscar (Unax Ugalde) is secretly in love with her. Laura and Angela's mother disappeared almost a decade ago, but one day Laura receives a message from Scratch (Mario Cocci), a drug dealer from Holland who claims to be in contact with her mom, and has a letter he says she wrote. Laura decides to set out to Holland to find her mother, while Angela tries to convince Laura to stay behind, certain she's being led into a dangerous trap.