In the first season, a group of ambitious petty criminals led by mastermind Keko pulled off the coup of a lifetime with a spectacular bank robbery: diamonds worth several million euros. Their attempt to sell the loot to supposedly professional gangsters proves to be a fatal mistake in the second season, as the buyers turn out to be members of the ruthless Yakuza, the Japanese mafia. And they're looking to close a much bigger deal. When the deal falls apart in a karaoke bar, the gangsters become the target of a task force from an international police unit.