Yeh Hai Mohabbatein starts with Toshiji and Mrs Iyer fighting over Ishita(Divyanka Tripathi) even as Adi and Mr Bhalla try to sort out things. Ruhi and Pihu meet Ishita in jail as Pihu requests Ishita to let her tell the family. Ishita asks her to promise her not to say a word to anyone and also yo always listen to Ruhi and Adi. Ishita asks Ruhi to take her role in Pihu’s life. She also asks them to never come to meet her again. Ishita remembers her time with Ruhi and Pihu. Ruhi and Pihu meet Raman(Karan Patel) outside and he says they will never come back to meet Ishita again. Ishita asks for a letter pad. She writes a letter to Shagun and asks the police woman to post it. Simmi tries to fill in the house’s void after Ishita left. She says she will run the house now. Toshiji hands over the keys to Simmi. Ruhi returns with Pihu and Simmi is happy seeing Pihu and Ruhi upset. She thinks she will destroy their lives. Param confiscates the letter from Ishita to Shagun and says he will destroy Raman and Ishita now.
Bhallaji tells Toshiji that they should get Param and Simmi martied again. They decide to talk to Param about this. Toshiji remembers Ishita and blames her for destroying their lives. Bhallaji meets Param at his house and sees him all drunk. Toshiji and Bhallaji decide to get them married. Romi listens to all this and talks to Bala. He requests Bala to get Ishita back as she is the only one who can save their house. Time passes and Ishita meets no one. The case is reopened a year later by Ashok Khanna.