It was the hinge on which modern finance turned: a small, procedural act that kept whole systems honest.… Lina had learned early on that vault doors are both literal and legal things. She was the bank’s senior compliance officer in the Brussels branch when the call came through: a custodial ledger showing an enormous balance tagged as “Central Bank — RU” — a position everyone at the desk already knew had been immobilised after the sanctions rolled out in 2022. The amount on the screen was measured in hundreds of billions, but the problem on her desk that morning felt smaller and more human: a private client, an opaque trust set up through a chain of shell companies, wanted the bank to move a tranche of securities out of the immobilised account and into an offshore repo to free up cash. Lina closed the ticket and opened the books. The entry read like many she’d seen before — a name she could not tie to a natural person, layers of nom...