Spain, 1981: When armed men hold up a bank and take hundreds hostage, a reporter races against the authorities to uncover the true motive for the heist.

Oasis is the most luxurious holiday resort in the country — a paradise reserved for the wealthiest families, featuring private beaches, VIP facilities, and impenetrable security. The perfect place to spend the best summer of your life. But everything falls apart when the police storm the resort to investigate a mysterious disappearance. In such an exclusive place, everyone is a suspect — and no one can leave until the culprit is found.