Phoebe Dynevor, Zoe Deutch, Madeline Brewer, McKenna Grace and Dylan O’Brien also star in an edgy thriller about Her son’s new girlfriend, Mom’s scary ex-student.

“We don’t always know what our children are capable of.”

This new thriller from the Polish director of “The Hater” hits theaters Oct. 29.

Nice little bit of counter-programming for Halloween from Lionsgate, a big break for villainess Dynevor and another showcase for Diane Lane.