Alana and a group of college seniors board a party train for a Halloween-themed bash, but their fun spirals into fear when a mysterious assailant begins killing the passengers one-by-one.

Chief inspector Constance Forest and her team match wits with petty criminals of all kinds in the fog-shrouded North Shore of Montreal.

The Cheval-Serpent is a male strip club with a sulphurous reputation whose success cannot be denied thanks to the work and vigilance of its owner and manager. But a change at Montreal's City Hall has repercussions on the bar and puts the institution in danger...