Rishta Likhenge Hum Naya S01 E124 The True Heir

Diya allows the man, who claims to be Ratan Maan Singh, to stay in the palace. She keeps a watch on the man with the help of Yash. Then, Ratan makes a video call to his teacher in London but the teacher too claims that he is not Ratan Singh. How will Diya find out the truth?