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.

Counterfeit money! Stulle, Pepsi, and Barro are furious! They get guns from the fence Ruslan. But the Japanese are already waiting for them... Meanwhile, Billy has tracked down the gangsters and asks her Dutch Interpol friend Enie for help.