"The Mousetrap" is a murder mystery play written by Agatha Christie. It first premiered in 1952 and has since become the longest-running play in the world. The story unfolds at a remote guesthouse, where a group of strangers becomes trapped during a snowstorm, and one of them is revealed to be a murderer. As the plot thickens, the characters must uncover the identity of the killer among them. The play is known for its suspenseful atmosphere and clever twists, keeping audiences guessing until the very end. It has been adapted into various formats, including radio and film, but remains most famous for its stage performances.