Seraphina Sterling cleans the offices she legally owns. Three years after faking her death to escape a cold-blooded marriage contract, she lives as a ghost in a blue uniform. Alaric Vance is the man she was meant to marry—a ruthless titan who is now undercover in her building to find a traitor. Neither recognizes the other in the midnight shadows. But as they scrub floors together and share whispered secrets, a dangerous passion ignites. When their masks finally shatter, they realize their "stranger" is actually their greatest enemy—and their only hope for survival.