Julian (Álex González) and his friend Luis (Miguel Angel Silvestre) are two neighborhood boys who are part of a gang of violent neo-Nazis, led by Solis (Javier Bardem). After start training in a gym, Julian is transformed gradually thanks to the discipline of boxing, the nobility of his coach (Carlos Bardem) and the love of a young latin girl (Judith Diakhate). All of this takes away from the group, but Luis is not ready to accept that leave the "herd".

Eva, a judge with a great future, has spent years exclusively dedicated to her profession. She believes strongly in justice and is not willing to make concessions, wherever they come from. One day she has to instruct the murder of a stripper. And there is a witness in the case, the victim's boyfriend, Rocco, a caring and friendly gigolo who is willing to help. In return, Eve will have to give some clues of her own identity.

Winning Streak is the astonishing story of a group of young down-and-outs who are presented with a once-in-a-lifetime opportunity; to change their luck and set off on the adventure of their lives. Thanks to an infallible method based on the roulette wheel’s imperfection, their lifestyle is about to become better than their wildest dreams, as they set out to break the banks at casinos around the world.