Tubbo falls in love with Tommy and Tommy puts up with him

A thriller based on cold murder of teenage girl Ava Wilson. At 17 Ava was looking foward to college and the end if her senior year. But that changed when her body was found floating in the neighbors pool. You are her sister Skylar, you decide to find who killed you sister and put a end to the mystery surrounding her death. But can you solve it before the killer gets to you?