Zindagi Aur Maut Ka Khel

Sangraam, a wrestler rushes back home to find his wife burned to death. CID reaches his house and starts their investigation, they come to know his servant is missing, just then Sangraam gets a call from Jaggu asking him to save her. On further investigation it is revealed that the dead body was not of Sangraam's wife. What happed to Sangraam's wife? Whose dead body was burned in their house?