After Bernie refers a client to fellow private eye Victor Klovsky, he is disturbed to learn that his peer has disappeared—and so has the client. The trail leads to the ruins of Nuestra Señora de los Saguaros. Some very dangerous people are interested in this old mission, but why? No one is better than canine investigator extraordinaire Chet at nosing out buried secrets, but before he and Bernie can figure it out, they are chased through a Christmas Eve blizzard by a murderous foe who loves art all too much.