In 'Spectral Signatures', you play as a down-on-their-luck detective in a city haunted by the unfulfilled contracts of the deceased. With the ability to communicate with ghosts, your task is to mediate between the living and the departed, solving their unsolved mysteries and fulfilling their last wishes to prevent the underworld from spilling into the realm of the living. Each ghost has a unique story and personality, ranging from comical to terrifying, and the choices you make will shift the balance of the supernatural realm, leading to multiple endings and revealing the truth behind the city's ghostly history.