In Acapulco, Hercule Poirot attends a dinner party in which one of the guests clutches his throat and suddenly dies. The causes seem to be natural until another party with most of the same guests produces another corpse.
During the launch party of a nude calendar, one of the models is thrown to her death by a black gloved killer. When the killer begins to strike again, going in the order of the calendar itself, a hard nosed cop realizes that he needs to solve the mystery, or risk all of the models ending up in the morgue!
When two sisters can no longer go on living with the painful memory of their baby sister being murdered 37 years ago by their stepmother, together they try to uncover the truth.
