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.

With an unexpected suspect possibly involved in her death, Maddie's forced to reveal more about the depth of that relationship - leading to unexpected consequences.

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.

Fugitive Janet is haunted by her past as the ghost group continues searching for Mr. Martin inside Split River High. Simon tells the living kids about Janet's body-snatching. A fire at a dilapidated farmhouse leaves Maddie's fate unclear. We are introduced to two additional ghosts at Split River High.