The indomitable duo of Arthur Bryant and John May, along with the rest of their quirky team, return to solve a confounding case with dark ties to the British theater and a killer who may mean curtains for all involved. For the crew of the New Strand Theatre, the play The Two Murderers seems less performance than prophecy when a cast party ends in the shocking death of the theater owner’s son. The crime scene is most unusual, even for Bryant and May. In a locked bedroom without any trace of fingerprints or blood, the only sign of disturbance is a gruesome life-size puppet of Mr. Punch laying on the floor. Everyone at the party is a suspect, including the corrupt producer, the rakish male lead, the dour set designer, and the assistant stage manager, who is the wild daughter of a prominent...