Hayat Uzun, daughter of a fisherman is under pressure to secure employment in Istanbul or she will have to return to her family in the countryside. A case of mistaken identity allows her to gain a job at multinational textile company Sarte, headed by Nejat Sarsılmaz, as personal assistant to Nejat's son- Murat's assistant, Cağla. Nejat's eldest son and heir, Murat Sarsılmaz, begins to fall in love with Hayat. This provokes jealousy from Murat's ex-girlfriend, Didem, the lead model for the company.
Jealousies cause Murat to push Hayat away, but he pursues her and apologizes, and eventually fires Didem for her plotting. Murat brings Hayat to his home to recover from a panic attack caused by Didem, and they bond, but Didem then arrives claiming to be pregnant. Hayat later learns from her friend Aslı that Didem falsified her hospital tests. Murat is distraught but accepts his responsibility to marry Didem. Both the families meet and decide their wedding. Murat's stepmother forces Didem to fake a miscarriage, releasing Murat from his presumed responsibility.
Murat proposes marriage to Hayat but Murat is still unaware of her true identity. Hayat feels sad but is unable to disclose this to him fearing she might lose him. Derya, Murat's stepmom discloses to him the truth. He is heartbroken when he learns she's been lying about her identity. Hayat loses her job and her grandfather demands she return for an arranged marriage. Murat tries to stop this and, after overcoming the bad history between their families, marries Hayat. However, Murat still has not forgiven Hayat and he is cold towards her.
Murat becomes jealous when Emre, a contractor to Sarte, flirts with Hayat, and the company suffers.
Later Hazal kills Murat's mom in a revengeful act. And after her death Murat finds out that she always loved him and came begging for him but His father and Grandma always threw her out.
Nejat sells his shares of Sarte to Emre. Emre on the other hand does a DNA test which says that Murat is not a Sarsılmaz. He black-mails Hayat to tell this to Murat or start working with Emre. Hayat is so distraught that she tries to kill herself, this changes Emre's mind and he decides to return his shares and he tell derya to end this then he calls Hayat for a last meeting which ends up in their accident with Murat's car. Emre have some serious injuries in accident, seeing this Derya gets a chance and explain everything to Murat without proving herself guilty. Murat is angry on hayat so Hayat decides to tell the truth to Murat. Murat is devastated on this news so Hayat does another DNA test which reveals that Murat is the heir of the Sarsılmaz family and Doruk is not. But Murat doesn't tell this to Doruk and for peace in their family, Murat convinces the staff at Sarte to accept his brother Doruk as their boss. Hayat finds out she is pregnant, and the series closes with a flashforward of a happy family life.