Okay kiddo, so there is a movie called The Last of Sheila. It's about a bunch of adults who are playing a game together on a yacht. The game is called "Sheila's Party Game" and it involves them trying to figure out who killed Sheila's husband last year.
Sheila was a woman who used to host a lot of parties with her husband, but he died in a hit-and-run accident. Now, Sheila wants to find out who killed her husband once and for all, so she creates this game to try and get her friends to reveal who knows something about the night he died.
Throughout the movie, the friends all have their own secrets and suspicions about each other. One of them even ends up getting killed during the game! It's up to the other friends to figure out who did it and why.
So, to sum it up, The Last of Sheila is a movie about a game where adults try to figure out who killed a man, and there are a lot of secrets and twists along the way.