Onur Karasu, a successful agent, has been after Civan Koral, a diamond smuggler, for months. For this operation, he has made Civan's sister Hilal fall in love with him and maintains a distant relationship with her. His plan is progressing like clockwork. Until a woman he has never met, Ece, enters his life. Ece, Hilal's friend from London, begins to suspect that Onur is up to something as soon as they meet. Ece drops like a bomb into Onur's operation and turns everything upside down.

Ece turns out to be a thief. She does not tell who she works for or what her purpose is. Onur decides to send her to prison. There is only one small problem. After the engagement fiasco, Civan Koral forbids Onur and his family from entering their house. Ece is the only person who can enter the house and leak information to the organization. Ece finally cooperates, but she ruins Onur's operation.

Onur decides to steal the Kameryan's famous diamond necklace from the auction organized by Civan. His aim is to put Civan in financial difficulty, destroy his prestige and prevent him from fleeing abroad. He needs Ece to carry out the theft. While Ece and Onur are making plans for the robbery, Ayla gives Onur the final blow. She warns him about the trouble he will get into by working with a thief. Onur struggles to control Ece on the one hand and tries to ignore his feelings for this extraordinary woman on the other.

Ece and Onur manage to steal the necklace of the Kameryans. But Ece drops the necklace worth a fortune. A brand new crisis emerges for Onur and Ece. Civan is seriously cornered after the theft of the necklace. While chasing after the thief who stole the necklace, he catches a clue that will lead to the organization. Onur and Ece have to assume completely different identities to retrieve the necklace from where it fell. For Onur, working with Ece is a nightmare, but at the same time, he starts to fall for her.

Onur saves Ece's life knowing that he will be exposed. Civan and Hilal start to suspect Onur. Ayla is uncomfortable with Onur risking both the operation and his life for Ece and warns Onur. Although Onur refuses, he is aware that he cannot control his emotions for the first time since Ece entered his life. While Ece hides from Onur that she knows Hazar, she is waiting for her sibling's DNA result. On the other hand, she is increasingly drawn to Onur. There is an attraction between them that they cannot resist, and the danger is increasing.