Billionaire Charles Abernathy, on the eve of his 75th birthday, invites his four estranged children back home out of fear that tonight someone – or something – is coming to kill him. To ensure his family will help protect him from whatever’s coming, Abernathy puts each of their inheritances on the line – they’ll get nothing if he’s found dead by dawn.

The siblings discover their father has left everything to a woman they have never met. As his death becomes the subject of a police investigation, the siblings hunt for his previous will.