ASHLINE_QUEENBEE
Detective Miles Finch investigates the brutal murder of wealthy Elias Thorne, who was found with his throat cut by a distinctive griffin letter opener. This weapon is identical to one used in a murder seven years prior.
Miles suspects Elias was a cold-blooded killer himself, who had previously framed and ruined his rival, Julian Vance, as revenge for his first wife's death. Miles theorizes that the killer of Elias Thorne is a third party seeking final justice for Elias's past crimes, making the present murder an act of retribution.
The investigation culminates in a shocking realization: the killer is still inside the mansion and has just escaped detection, leading to a suspenseful chase.