Zurich drug agent Herbert Strähl dreams of making a big catch. Yet the only fish he manages to catch is the piranha in the aquarium tank he has at home. He laboriously persists in grappling with small-time dealers and junkies while being left in the lurch again and again by his colleagues Ruedi, Dani and Marco. Strähl hides his loneliness and his yearning for love beh...