Your heroine is posing as a cleaning lady. She’s working undercover to find something. What is she trying to find? Who, if anyone, is she working for? For example, maybe she’s a spy working for an agency or maybe she’s trying to find out who killed a friend or family member and she thinks she knows who did it.
What happens when she finds what she’s looking for? Where is the conflict? For example, maybe she falls for the son of the man she thinks killed her friend or maybe she realizes that she’s wrong, but now someone knows that she’s digging and her life is at risk.
Who is your hero?