Dear Past (Sevgili Gecmis) is about three sisters who grow up unaware of each other, coming together years later. İpek, one of the three sisters, is informed of the existence of two sisters, Deren and Çilem. İpek, who was preparing for marriage at the time, wrote to his sisters and invited them to his wedding. However, İpek's co-candidate Tekin is a sadistic person. İpek begins to be abused by Tekin. Deren and Çilem, who were shocked by the letter they received and abstained from believing in İpek, want to save their sister from the hell she is in over time.