A murdered cop comes back as a spirit to investigate his own murder.

Ronan O'Connor is killed by a brutal and relentless killer. Ronan returns as a ghost, and will not rest in peace until he solves his own murder by using his ghostly powers. Along the way to finding his killer, Ronan is also helped by Joy, a girl who not only witnessed Ronan's death, but can also see and speak to ghosts (including Ronan.)—Square Enix