A (adjective) female hitchhiker joins a married couple who are also hitchhiking/or on a road trip (driving in a car). The three stop at a gas station then the two women go missing. The ( the antagonist/antagonistic force) husband becomes the prime suspect.

Kratika Jain, hi! I apologize if I did not understand your logline. It needs more work. Best! Pam

Hey, Thanks for the input. I'll work on it.