It’s a mix of masked murderers and social satire, as Jamie has to navigate the “problematic” new world she finds herself in. Nahnatchka Khan’s movie is slight but enjoyable, and Mad Men star Shipka is a deft horror heroine.

In trying to break the tension with humor, too many horror movies undercut their emotional stakes by instead being glib, a pitfall “Totally Killer” mostly manages to avoid.

It’s not necessarily a new slasher classic, but it is the kind of film horror devotees can happily kick back and enjoy on a cozy Friday night in October, and that’s a particular achievement all its own.

Totally Killer is a blast. Despite the tragic premise of the story, it never takes things too seriously and it is perfectly happy to give you an entertaining ride.