An emergency at the Ferris Court family mansion, owned by the Sterron family: on Sunday morning, the owner of the house, Captain Sterron, was found hanged in his office. The captain had good reasons to kill himself, so no one is really surprised. But it seems that everything is not so simple, and an ordinary suicide turns into a complex criminal case. And many have a motive: from Sterron’s unhappily married wife Griselda to the county sheriff. Superintendent Dowley will have to figure out this mystery. Eustace Hendall is a 35-year-old London sybarite who makes his living by playing cards with rich young men. Eustace is from a wealthy and titled family, but belongs to the younger family branch, and he cannot count on an inheritance. However, when two of his cousins die while swimming in the sea, his chances improve. Yes, some of the older relatives are still alive, but accidents happen at every turn. But it seems that not only Eustace is interested in the inheritance...