A workplace rivalry takes a deadly on a chilly December morning.

Never make a major life decision in the wake of emotional turmoil. Cassie Romano learned this the hard way, leaving sunny San Diego for a teaching position at a private school in the Catskill Mountains in upstate New York, after a painful break-up left her heart-broken and in need of a change.

It all seemed so perfect in June when she came to interview. But now it's December, and she's stranded on top of a mountain surrounded by snow, ice, and acres of wilderness, lonelier than ever and bored out of her mind.

When a fellow teacher turns up dead and Cassie receives a cryptic letter from her a few days later, it's clear to Cassie that something strange is going on at Falcon Ridge Academy. Everyone seems to be writing the death off as a tragic accident, but Cassie's not so sure.

Cassie has secrets of her own, though, so she's initially reluctant to get involved. Torn between the urge to protect herself and the desire to investigate further, she decides on the latter.

And the consequences could be deadly.