When 6-year-old Max Shacknai, son of wealthy pharmaceutical executive Jonah Shacknai, plummets to his death in a mysterious fall over a second-floor banister at the Spreckels mansion in Coronado, CA, the family is left in a state of shock. But only two days later, Jonah's live-in girlfriend, Rebecca Zahau, succumbs under equally suspicious circumstances, leaving both deaths begging the question: suicide or murder?