When night falls in Ennis, Alaska, the eight men who operate the Tsalal Arctic Research Station vanish without a trace; to solve the case, detectives Danvers and Navarro will have to confront the darkness they carry in themselves.
Danvers and Navarro, feeling that they are close to cracking the case, enter the caves. After much travelling they finally emerge...in Tsalal. It turns out they're not the only ones there. Meanwhile, Peter is cleaning up after the recent tragedy.—grantss