The writer Philip Kampf was brutally murdered in his apartment…
A visitor by mistake takes Goodwin’s cloak, leaving his own cloak on a coat rack in the entry hall of the Wolf’s mansion. Goodwin goes to get his cloak. He couldn’t make an exchange—police were everywhere there—but he returned with a client instead—a dog. Now the client of Wolf is a huge Labrador. By day, the client lies on Wolf’s favorite rug in the office, and goes to sleep in the basement with Fritz. Wolf wants to solve the murder of his dog’s owner in order to keep the dog for himself!