Within a month of buying a Palm Beach condo, Audrey and Nate Stevens meet the eccentric millionaire Vincent Xaveir Houten. Their friendship lasts fifteen years but is brought to an abrupt halt when Vincent is murdered by a point-blank gunshot to the head.

Being the last to see the victim alive always makes you the first suspect. That's the case for the Stevens until they convince police they'd never commit such a gruesome act. Once they're cleared, their relationship with Vincent turns them into trusted advisors as a Palm Beach detective searches frantically for a lead.

The...