Horace was a guest at the home of his old friend Zdeněk, who lived in a secluded house on the shore of a lake with his current wife and his ex-wife. During his visit, Horace witnesses two strange deaths. However, not wanting to get involved in any more cases, he leaves the beautiful place without forming a clear opinion about the events. Two years later, however, circumstances cause him to doubt whether he did the right thing, so he goes to see Vašátko to get some clarity on the case. They both come to the conclusion that a murder took place in Zdeněk's home and also identify the perpetrator. All that remains is to convict him...