Hercule Poirot and his trusted friend, Captain Hastings, are on vacation at a luxurious hotel in Brighton. However, their elegant evening is interrupted by a scandal: a priceless pearl necklace disappears from a locked box in the room of a wealthy guest, Mrs. Opalsen. The maids fall under suspicion, the police are stumped, and the suspects swear their innocence. Will the great Belgian detective, using his famous "little gray cells," be able to unravel this perfect criminal plan and find the real thieves?















