Hayat Uzun, a native of Giresun village and 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. Originally the job was reserved for Suna Pektas a family friend of Sarsilmaz’s. Nejat’s eldest son and heir, Murat Sarsılmaz, begins to fall in love with Hayat. This provokes jealousy from Murat 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 Asli 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 Derya, learns the truth and forces Didem to fake a miscarriage, releasing Murat from his presumed responsibility.
Meanwhile, Ibhrahim, Hayat’s landlord’s nephew enter the plot. Hayat with the help of her friends Ipek and Asli decides to make Murat suffer a bit. She pretends to be in a romantic relationship with Ibrahim which sparks Murat’s jealousy. Later on due to a series of events Murat comes to know this pretense. On Suna’s(Hayat’s) birthday, Murat welcomes Hayat in his life in the same place where he lost his mother. Both begin a very happy relationship. But Hayat is in constant despair due to her false identity. Murat proposes marriage to Hayat but is still unaware of her true identity. Hayat feels sad but is unable to disclose this to him fearing she might lose him. Derya discloses the truth to him and he’s heartbroken. 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 realises he still has not forgiven Hayat and is cold towards her.
Murat becomes jealous when Emre, a contractor to Sarte, flirts with Hayat, and the company suffers. They fall more in love and friction in their relationship increases at the same time.
Murat’s first mom returns with nurse Hazal in a series of events. When his mother is hospitalized from an accident, Muraat contemplates Hayat’s desire to separate and realizes that has to fight for her. Murat tries to repair his relationship with Hayat, but she spurns his efforts. Emre sends an unusual message to Hayaat convincing her of his love for her. Murat is angry on Hayat and he leaves her saying the marriage is over. But then Murat returns to save Hayat from a fire, saying that he cannot live without her.
Later Hazel kills Muraat’s mom in a revengeful act. And after her death, Muraat 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 tells Derya to end this then he calls Hayat for the last meeting which ends up in their accident with Murat’s car.
Emre has some serious injuries in an accident, seeing this Derya gets a chance and explains 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.