A podcaster searches for an informant who's gone missing under mysterious circumstances.
Talia March, Pallas Llewellyn, and Amelia Rivers suspect that seven months ago, they were victims of an experiment designed to enhance their innate paranormal abilities—Talia, for instance, can now find hidden or lost objects, including dead bodies. Now the three friends co-host a popular podcast that investigates paranormal mysteries. When a devoted listener named Phoebe Hatch offers to sell them a list of possible subjects for the experiment they think they were part of, Talia heads off to Seattle to meet her. When she arrives at the designated spot, though, she discovers Luke Rand, another potential buyer, but no Phoebe. Luke believes he was part of a related experiment, with the goal of creating psychic assassins. Phoebe is missing, but Luke and Talia find several clues that point them to the Night Island, an exclusive getaway in the San Juans that promises meditation and a full digital detox. Determined to find the missing list and rescue Phoebe, they decide to go to the Night Island, posing as a married couple. The early chapters are overburdened with too much exposition, but the plot picks up once Talia and Luke arrive on the island, where the bioluminescent plants give off a strange, menacing energy. Krentz successfully leverages the creepy, isolated setting. A bout of bad weather postpones the daily ferry service, and the island is cut off from civilization with no cell service or Wi-Fi. The staff is curt and unwelcoming, and when several of them die under mysterious circumstances, there's no way to call for help. The guests are desperate to escape the murderous island even as the flora and fauna seem to become imbued with more power and energy. Talia and Luke continue their search for Phoebe and investigate the murders, even as their pretend relationship turns into a real romance.
A slow start evolves into a pleasing paranormal story.