Ek Nayi Ummeed: Roshni - Season 4 (2015)

At the insistence of Dr Sameer and Mona, Rajat re-appoints Roshni in the Leela hospital. Dr AK manages to placate Rajat. Rajat returns home and apologises to AK for not taking care of Leela Nursing Home. AK decides to work in Sihor hospital and leaves Bhopal. Rajat and Mona are happy to reunite.

Rajat feels relieved on meeting his family and celebrates with Mona. However, Vasundhara is unhappy with Rajat. Ansal gives a deadline to Rajat, to fulfill his demands for the Leela hospital. Roshni is upset to see Ansal at the hospital. Dr Sameer is furious at Roshni.

Sharad decides to create differences between Rajat and Roshni. He tells Roshni that Rajat has allowed Ansal to invest in Leela hospital. Roshni learns about Dr Malhotra's conspiracy. She needs some time to prepare for the examination, but Dr Sameer wants her to look after the patients.

Dr. Sameer takes up an emergency case and is concerned for the child. At Roshni's insistence, Sameer allows her to perform the surgery on the patient. Although, Roshni succeeds in healing the patient, Rajat scolds her for performing the surgery without license. Later, Roshni criticises Rajat.

Dr Sameer is grateful to Roshni for taking care of his ailing father, and apologises to her for his past behaviour. Dr. Anand sympathises with Roshni. Rajat strives to reopen the Leela Nursing Home for Vasundhara's sake. Sameer is sad after recalling his past.

Roshni is elated to learn about Dr. Sameer's concern for her. Rajat is furious with Sharad for deceiving him about the Leela Nursing Home agreement. Roshni and Mona try to placate Rajat, but Vasundhara is upset about Rajat's relationship with Mona. Roshni loses faith in Sharad.

Roshni is confident of Ansal's conspiracy against her and Rajat. She urges Dr. Sameer to help her in proving Ansal's misdeeds. Dr Sameer's father thanks Roshni for healing him. Roshni gets a valuable information about Ansal's driver. She and Dr Sameer decide to save him.

Dr Sameer shares his feelings with Roshni. Elsewhere, a ward boy attempts to kill Ansal's driver, Sunil, who is in a critical condition. Guddu assures Dr Sameer of taking care of Sunil. Dr Malhotra plans to kill Sunil. Nikhil is happy to receive Roshni's call. Roshni talks to Dr Sameer's father.

Dr. Sameer and Roshni manage to save Sunil's life. Mona's father protests against her relationship with Rajat. At Roshni's insistence, Sunil discloses Ansal's misdeeds. Roshni asks Ansal to cancel his agreement with Rajat and also wants him to transfer Leela Nursing Home to Dr AK Singh.

Roshni succeeds in cancelling the agreement between Rajat and Ansal and also protects the Leela Nursing Home from Ansal. Rajat is overwhelmed with joy to learn the same and thanks Roshni. Mahesh is against Rajat and Mona's relationship. Roshni advises Rajat to marry Mona.