Agonies (1954)

A couple has adopted a child ;the man ,a successful singer, gave up his career and became a race horse breeder .But the mother comes back and ,after marrying a wealthy man in South America,wants her brat back.She hires a shady private eye :blackmail,emotional blackmail,libels, despair of the wife who leaves her husband ,and the boy runs away from his desirable home.The biological mom will step aside in favor of the virtuous adoptive one,and dad will resume his career.