The Horror of Party Beach Radioactive waste dumped off the coastline creates mutant monsters. The beasts attack slumber parties, beaches, and tourists, and terrorize a waterfront community as a scientist, his daughter, her boyfriend, and the local police try to find a way to stop them.
Thir13en Ghosts (2001) Review
I suspect in a haunted house movie it is the ghosts and house that are the real stars. It is a shame that they had to include this plot and these characters.