The body of former baker Franko Bleich is discovered near the Elsterbecken in Leipzig. It seems the killer planned to dispose of it in the river but was interrupted. This is a case for The Quartet. Detective Maike Riem and her team delve into Franko’s personal life, investigating both his family and neighborhood. As they peel back layers of suspicion, they uncover complex relationships and hidden motives within his close circle, suggesting that secrets from Franko Bleich's past may have led to his untimely demise.