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.

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.

Amongst the sparkly lights of Split River's Homecoming Dance, Operation Find Maddie's Killer goes into overdrive leading to surprising revelations.

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.

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/Maddie returns home to a shocked and relieved Sandra. The ghosts discover the objects from their deaths unlock hidden spaces. A mandatory school event uncovers tension between the living kids who are more concerned about Janet's return.

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.