Four years after defeating The Grabber, Finney Blake is struggling with life after captivity. When his younger sister Gwen begins receiving calls in her dreams from the Black Phone and seeing disturbing visions of three boys being stalked at a winter camp, the siblings become determined to solve the mystery and confront a killer who has grown more powerful in death and more significant to them than either could imagine.

Alexa, a seemingly vibrant and successful woman in her early-30s, but who masks a past so devastating that it has left her damaged, and forever obsessed about the secrets kept by those she loves most.

Two half-brothers meet for the first time after the death of their estranged father and embark on a road trip across Northern Ontario to spread his ashes.