Talia March, Pallas Llewellyn, and Amelia Rivers, bonded by a night none of them can remember, are dedicated to uncovering the mystery of what really happened to them months ago - an experience that amplified innate psychic abilities in each of them. The women suspect they were test subjects years earlier, and that there are more people like them - all they have to do is find the list of others who took that same test. When Talia follows up on a lead from Phoebe, a fan of the trio's podcast, she discovers that the informant has vanished. Talia isn't the only one looking for Phoebe, however. Luke Rand, a hunted and haunted man who is chasing the same list that Talia is after, also shows up at the meeting place. It's clear he has his own agenda, and they are instantly suspicious of each other. But when a killer begins to stalk them, they realise they have to join forces to find Phoebe and the list.