When renowned crime novelist Harlan Thrombey is found dead at his estate just after his 85th birthday, the inquisitive and debonair Detective Benoit Blanc is mysteriously enlisted to investigate. From Harlan's dysfunctional family to his devoted staff, Blanc sifts through a web of red herrings and self-serving lies to uncover the truth behind Harlan's untimely death.

Young and disenchanted Sam meets a mysterious and beautiful woman who's swimming in his building's pool one night. When she suddenly vanishes the next morning, Sam embarks on a surreal quest across Los Angeles to decode the secret behind her disappearance, leading him into the murkiest depths of mystery, scandal and conspiracy.