After the tragic death of their mother, Mel and Maggie learn they have an older sister, Macy, and discover they all exhibit impossible new abilities.

After getting a message from the spirit board to not trust Harry, the sisters are conflicted and ultimately concoct a plan.

Mel turns to Harry for guidance after learning information about the magical world that leaves her questioning everything she knows. Galvin shows up to see Macy and she is determined to not let fate get in the way of their potential relationship. Meanwhile, Maggie tries to keep her mom’s Christmas traditions going and is excited for Parker to be a part of it.

With life seemingly back to normal, Parker tips off Maggie to a mysterious death on campus that might be of demonic nature. After the sisters consult with Harry, they try to trap the creature, but they soon realize that not everyone can avoid its powers. Meanwhile, Galvin remembers something from his grandma’s stories that could help Macy overcome her dark side.

Maggie, Mel and Harry grow wary of Macy's newfound power; Macy keeps creating alternate realities, but they don't end up being the perfect versions she was hoping for; Maggie and Mel still struggle with what will happen in their personal lives.

Macy must fight a dangerous enemy to survive; Maggie’s impromptu karaoke duet with Jordan may lead to answers about her powers. Meanwhile, Mel and Harry take a gamble on a demon who may know the Assassin’s whereabouts.