[Machine Translation] A thirsty heart connects them. A melody of confrontation that cuts through the ruthless Parisian underworld. A masterpiece of French crime cinema from the famous duo of "Farewell, My Friend"! Jeff (G. Rouquier), a shrewd criminal of the Parisian underworld, and five of his friends rob a jewelry dealer and steal a large amount of diamonds. Jeff then goes to a Belgian fence to redeem the diamonds for cash, but Jeff disappears. But Jeff disappears without a trace. Diamant ( F. de Pascal ) and his friends are furious at being betrayed, but Laurent ( A. Delon ) is the only one who wants to believe in Jeff. So Diamant and his men put a guard on Laurent and go to the house of Eva ( M. D'Arc ), Jeff's lover, to find out his whereabouts. Eva is tossed about by her suspicions, and the result is a shocking one...