Successor's Billionaire Husband

An abandoned "bastard" child, Norma Garner, unexpectedly inherits a vast fortune from her father. However, her stepmother and sister conspire against her. When danger looms, a mysterious billionaire, Kris Hearst, steps in to help Norma reclaim her rightful inheritance. Who is this charismatic bachelor and what motives propel him to aid Norma?