It started as a quiet night, a much needed reprieve for the overworked team of Detective Reed Mattox and his K-9 partner Billie. With just a single phone call from dispatch, both are plunged into a nightmare they could have never imagined. Somewhere in the greater Columbus area, a young twenty-something is sealed away inside a coffin. With no recollection of how she got there or who might have put her there, she is desperate. Armed only with a dying cellphone and a waning oxygen supply, her hours on earth are limited. Calling on every resource imaginable, Reed and Billie sprint headlong into the search, embarking on a twisted path that proves to be so much larger than they could have ever imagined.