Diane is a successful businesswoman who has recently gone through a breakup and is not ready to start dating again. However, she has an important work event coming up and doesn't want to attend alone. Her sister suggests that she hires a rent-a-date, someone who would pretend to be her boyfriend for the night.
At the event, Diane meets her rent-a-date, a charming and good-looking man named Derek. Initially, everything seems to be going well, and Diane is even starting to feel a connection with him. However, as the night progresses, Derek's behavior becomes increasingly strange, and Diane starts to suspect that he's not who he says he is.
Soon, she discovers that Derek has a dark and disturbing past and that he's been lying to her all this time. He's a compulsive liar and con artist who's been hired by someone to infiltrate her life and steal valuable information from her company.
As Diane tries to get away from him, she realizes that he's become obsessed with her and will do anything to keep her close. She's caught in a dangerous game of cat and mouse, and her life is in danger.
In the end, Diane manages to outsmart Derek and escape his clutches. She learns to trust herself and rely on her instincts, and she realizes that she doesn't need a man to be happy and successful.