Glass room. Clivz E.

In the solid house of writers on the coast of Northumberland, a course is held for novice authors "Literary autopsy: how to write a short detective story." For a whole week, participants will hone their skills and think through the impeccable scenario of the murder. It is not surprising that one in the evening the body of one of the teachers with a frozen grimace of horror on the face is found on the balcony.

Almost everyone in the house had the reason for the death of Tony Ferdinand, but only Joanna Tobin was seen with a knife in his hand next to the dead. By a happy chance, she is a close neighbor and friend of the inspector of Vera Stanjope, who has long had to unravel difficult matters. It soon becomes clear that a real criminal substituted a woman. Only how to calculate the killer among those who make their living, composing perfect crimes?