Sanction (Sanction #1)

Leningrad, 1987. When a woman's corpse is discovered on New Year's Day, a hungover Detective Pavel Smirnoff hands off the case to his partner, Detective Boris Dimitrovich, hoping he'll close it without fuss. Instead, Dimitrovich uncovers a connection to an old, unsolved crime, dragging them both into an investigation that puts their careers – and possibly their lives – at risk.