Evil has been present during the evolution of mankind and the Dashavatar (ten incarnations of Hindu God Vishnu) have been constantly present to triumph over evil.
Tulsi and Suraj are blessed with four kids. But Tulsi is diagnosed with cancer and Suraj gets killed. Tulsi takes the decision to have her children adopted to good families before she passes away.
Ajay saves Anju in a fall from a mountain height, it is love at first sight. He doesn't know that she is engaged, and they don't know they have a past together.