It began as prank, ended in murder.

Part. 1: 1994

Dina and her friends have to stop a bunch of old killers chasing them and Sam when they find out two survivors experienced the same thing back in 1978.

Part. 2: 1978

Christine was telling the story of what happened when a mystery somebody showed up causing a big argument until they hear a noise from the bathroom. They told the rest of the story together explaining their relationship and what happened.