Seven months after a mysterious event at the Lucent Springs Hotel, friends Pallas Llewellyn, Talia March, and Amelia Rivers now co-host the podcast Lost Night Files, investigating cold cases and their own enhanced psychic abilities. When Pallas receives a tip about an abandoned asylum in Carnelian, California, she encounters Ambrose Drake, who believes he witnessed a murder at the nearby Carnelian Sleep Institute but lacks evidence. As Pallas and Ambrose team up to uncover the truth, they face danger from those determined to keep dark secrets buried.