To secure a clean identity, elite assassin Specter enters a contract marriage with Marcus Cole, a seemingly ordinary, painfully frugal warehouse worker. She does not know that Marcus is actually Warden, the legendary agent hunting her organization—and he has known her true identity from the beginning. While sharing an apartment divided by yellow tape, the two hide deadly missions behind grocery bills, discount bread, and awkward domestic rules. As suspicion turns into trust, both are ordered to kill the other—and both refuse. Forced to confront betrayal, rival agencies, and a mastermind known as Zero, they must choose between loyalty to their systems and the dangerous love that has become real.