Maddie and the ghosts confront Mr. Martin, ultimately trapping him in the afterlife; new information leads to a chase through the school's scars, delaying Maddie's return to the living world and putting her body in jeopardy.

Questioning their existence, the spirits seek Mr. Martin for answers. Maddie must confront the latest suspect which challenges everything she thought she knew before. Xavier, Claire and Nicole look for answers at an abandoned house. When the truth is finally revealed, Maddie must face unexpected and devastating consequences.

Janet/Maddie agrees to have Maddie's friends over for dinner and the tense meal ends with Janet realizing her cover is blown. Meanwhile, Maddie explores the school's "scars" and uncovers intel about Janet that shakes her resolve.

While acclimating to purgatory at Split River High, Maddie becomes determined to solve the mystery of her disappearance. While observing those she left behind, Maddie begins to realize everyone is not as honest and loyal as she once thought.

As she grows close to the spirits in the ghost world, a driven Maddie begins to unravel the events surrounding her death, only to discover someone other than Xavier may have been involved.

Maddie and the ghosts find a link between their scars while Simon and team go on a mission where tensions rise with the arrival of an unexpected visitor.