Kusum is excited for her first day at college, catches up with some of her old friends. Enter Ronobir Chatterjee, the harbinger of mishappenings. Kusum tries avoiding him for her own good.

Charu trickily invites Kusum to the party a day prior to her exam. Frustrated at not being able to perform well in her exam she dashes off to give Ronobir a piece of her mind. Ronobir drops Kusum home after a long day at college and heads back to his place.

Ronobir asks Kusum out for prom, to which she rejects. Sujata pays a visit to Ronobir’s college to invite his friends for the surprise birthday party.

Ronobir is on his way to drop Sujata to the airport. Kusum dreams of Ronobir proposing her for the prom, but it was Ratan instead. Kusum gets jealous seeing Charu with Ronobir at the prom, and confesses her feelings for him.

Kusum tells Ronobir that she is pregnant, Ronobir convinces her to abort. Ratan helps Kusum abort the child.

Kusum has moved on in her life. Ratan proposes Kusum, to which she agrees. A new specialist for Cholera is introduced to Dr. Kusum Ganguly to help her fight the pandemic.

Kusum and Ronobir are spitting venom at each other early in the morning. Monalisa has arrived at the hospital to help them cure the infected. Ronobir throws a party to the team for successfully fighting Cholera.

Ronobir arrives home to his daughter and reminisces about his late wife. Kusum and Ratan receive an invitation for the college reunion. Kusum is thrilled to find some old friends at the reunion.

Kusum decides to meet Ratan and a have a talk with him, but she discovers something new. India and Pakistan enter a war. Kusum decides to pay a visit to Ronobir at his home.

Kusum has volunteered for border posting. Kusum’s camp has been attacked and captured by Pakistani forces. Ratan and Ronobir set out on a rescue mission along with the group of Naxalites.