In this debut American adventure, Poirot arrives in New York City and seeks to rent an apartment. However, upon inspecting a potential rental, he discovers a corpse in the room. The victim appears to have been strangled, and the door was barricaded from the inside. Poirot collaborates with his new secretary, Abigail Fletcher, and Inspector Stevens of the NYPD to unravel the mystery. Through his signature deductive reasoning, Poirot uncovers the truth behind the murder and brings the culprit to justice .