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.

Maddie confronts Mr. Martin, who flees. Janet, in Maddie's body, returns to her family's now dilapidated farmhouse, triggering memories. A conflicted Simon struggles with his desire to help Maddie and protect his own grasp on reality.

Janet is finally ready to give answers. Mr. Martin hatches a plan, Maddie reevaluates her relationships with Wally and Simon, and Quinn makes a discovery.

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.

When the search for Maddie's killer puts Simon in real jeopardy and exposes Maddie's connection to the living world, Maddie must navigate Split River High's spooky spectral underbelly - first alone, and then with the help of her fellow ghosts.

As Homecoming unfolds at Split River, Maddie finds herself divided between accepting her fate in purgatory and a newly hatched plan to crack a new suspect.