Lars Bergman is no ordinary janitor. He's the CIA's locksmith. Formerly part of the CIA's infamous Surreptitious Entry Team, Lars is now responsible for every padlock, safe, and secure door across the CIA headquarters. He's never met a lock he couldn't pick... except one, which he tried and failed to open during a botched mission in Warsaw at the end of the Cold War. Cruising toward retirement, Lars's life is upended when a senior CIA official dies and he's called upon to open the safe in her office. Inside the safe is a clue only Lars would notice, left by someone he'd worked with in his heyday. As he investigates, Lars soon realizes that his failed Warsaw operation has come back to haunt him and perhaps give him another chance at picking the one lock that's ever eluded him. What Lars doesn't realize is that what the lock is protecting could have dire ramifications for the organization he has spent his whole adult life safekeeping.