When Freddi and Luther are at school one morning, a ghost appears and tries to steal Luther's action figure toy. Following the ghost to the basement of the school, they discover that the ghost is just someone wearing a ghost costume. They then plan a trap to catch the sharks, but they are missing some objects needed for the trap.
Source: Wikipedia, "Freddie Fish", available under the CC-BY-SA License.
This point-and-click adventure changes slightly each time, ensuring a unique procedure each play.