Facing a lull in cases, Sergei visits his recuperating father, only to receive a call for his assistance from a childhood acquaintance, Dana. Her brother has gone missing during a seemingly normal business trip. The trail leads him to an unlikely assistant, and down a road of complicity and far-reaching means he'd never had cause to consider in any prior assignment. Even worse, the threat posed to Sergei and those around him is not limited to the...