If people had been given the ability to predict the course of events!… Then Aida wouldn’t have gone on a date in the “Aquarium” garden, and Manon—her sister—wouldn’t have agreed to meet her new admirer! There would be no trouble, and no need for private detective Alexey Kisanov to postpone his long-awaited vacation… But the police ask him for help. Two cruel and mysterious murders. The disappearance of a girl pumped up with drugs called “truth serum.” And, most importantly, the search for evidence of the criminal’s guilt—evidence that simply refuses to fall into the investigator’s hands! Will the killer escape punishment?