When a mysterious package arrives on the doorstep of Vera Manor, Mel and Kaela must turn to Dev to try and stop the Tallyman's (guest star ) deadliest attack yet. Meanwhile, Maggie is forced to do court-ordered "anger management" with a very unorthodox therapist.

Mel, Maggie and Kaela must divide and conquer when they become aware of a new, formidable threat inspired by the Tallyman. Maggie and Harry team up to chase down a lead in a dangerous magical realm. Mel needs Jordan's help healing a "creature" with whom she has a deep emotional connection. And Kaela's budding flirtation with Dev must contend with a surprise visitor from her past.

Maggie is surprised by someone important from her past and tries to keep the peace when they collide with her present. Mel, Kaela and Dev are on the trail of the Unseen, while Jordan and Harry seek assistance from a different powerful trio.