A promising young athlete is found dead. The cause of suicide is quickly considered. After a positive doping check, the young woman was unable to participate in the Olympic Games. While it finally turns out that she was murdered, the list of potential suspects only lengthens. Her ex-boyfriend with whom she was seen the night before her death. Her ex-boyfriend's new girlfriend. And even her trainer, with whom she almost fell out shortly before her death. But when the coach himself is found dead at the athletics club, the investigators have to start all over again. What have they neglected ?