Eerie excitement is in the air as Alana (Robyn Alomar) and a group of college seniors board a party train for a Halloween-themed bash, but their fun spirals into fear as attendees are killed off one by one by an unknown killer. Concealed by costumes and plagued with chaos, everyone is a suspect. As the party train continues full steam ahead, Alana must race against the rails to find the killer before she becomes the next victim.