Swaragini is based on the sweet and bitter relationship between two half-sisters, Swara and Ragini. Swara hails from a Bengali family and Ragini belongs to a Marwari family. Both families are neighbors, but Swara and Ragini's grandmother don't get along. Ragini's father Shekhar and Swara's mother Sharmishtha were lovers in the past and Swara is Shekhar's daughter. Swara comes to know this truth, so she and Ragini join together to reunite their parents. They both get their parents married.