Ekaterina, a travel agency employee, has given up on family life and is thinking about changes. Her husband has become indifferent to her; her old friend, on the contrary, shows her increased attention. And everything would have been decided simply if her school friends had not started dying one after another. Catherine feels that she herself will be the last... But!.. By what principle does the killer choose victims?.. The book was previously published under the title “My husband is a maniac”