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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.

Onur tells Ece that Elif is not her sister, so the operation can continue. Ece is very sad and cries. When Onur hugs her to console her, his conscience is shattered. On top of that, Hilal shows up and sees them like that. Unfortunately, the story they made up for Hilal about what they did together in the middle of the forest does not work. Hilal seems to believe them both, but secretly hires a private detective and starts an investigation... In order to make up for the lie he told to Ece, Onur's only chance is to catch Civan Koral as soon as possible. As the operation continues at full speed, a private detective photographs Onur and Ece moment by moment...

Although Onur is in the middle of the operation, he is overcome by his emotions for a moment and returns Ece's kiss, but he quickly comes to his senses. He leaves Ece just like that. They get the weapons and even get the evidence to catch Civan. Onur has to go to Bulgaria to catch Hazar where the weapons will be delivered. He leaves Ece in Istanbul and sets off. News comes to the organization; there is a clash in Bulgaria and there is a wounded person. Ayla and Ece rush to the hospital. Hilal convinces Civan to launch a new collection that Onur will design at Koral Jewelry. When she calls Onur to tell him the news, no one answers.

Onur finds Ece at the place where Hazar, whom he arrested, was kidnapped. He goes crazy. He picks Ece up, first takes her to his house, and then asks her to tell him everything. Ece confesses that Hazar raised her and that she hid it from him. She confesses everything. Onur has neither faith nor trust in Ece. He handcuffs her and takes her to the organization. President Firuz sends Ece to prison and fires Onur from his job. His profession is everything to Onur. Ece doesn't forgive herself for causing this.

Ece's near-death experience in the cold storage brings Onur and Ece closer again. Ece wants to find Hazar at all costs and make up for her mistake. Ece puts herself in danger again. Ece being taken hostage by Hazar becomes a moment of enlightenment for Onur. He loves Ece more than anyone and anything in his life. He is now ready to overcome all obstacles to claim his love.