For the past several years, the "Heart Eyes Killer" has wreaked havoc on Valentine's Day by stalking and murdering romantic couples. This Valentine's Day, no couple is safe.

A full moon rises in Beacon Hills, and with it a terrifying evil has emerged. The wolves are howling once again, calling for the return of Banshees, Werecoyotes, Hellhounds, Kitsunes, and every other shapeshifter in the night. But only a Werewolf like Scott McCall, no longer a teenager yet still an Alpha, can gather both new allies and reunite trusted friends to fight back against what could be the most powerful and deadliest enemy they’ve ever faced.