Mousetrap for Three Persons

Katya is so happy. Her beloved husband Valik, also known as professor Kryakvin, has returned from a long expedition. But this joy gets saddened by an awful event. Soon Valik was accused of murder of his neighbor, the grumpy old woman - And what else can one think catching Valik over a corpse with the murder weapon in his hands? Of course, the friends won't leave Katya in this trouble. Irina and Zhanna rush to rescue and begin their own investigation.