Spending Christmas on picturesque Catalina Island seems like the perfect idea for private investigators, Kerry and Terry McAfee. That is, until they learn that the hotel room they've checked into was recently occupied by a pair of feuding newlyweds, and that the bride and her rare green diamond ring have both gone missing. When the body of a local diving instructor is discovered floating in Avalon Bay, the twins offer up their services, and soon find themselves embroiled in a dangerous web of lies, deceit, and holiday debacles. Between the mysterious stalker, a suspicious sheriff, and a conspiracy that reaches from the shores of Santa Catalina all the way to an African diamond mine, this trip certainly isn't turning out as planned. Add to the mix Cousin Robert playing Santa Claus, Aunt Reba facing the consequences of an illicit love affair, the amorous advances of a handsome stranger, and a toothless escaped poodle, and it's just another family Christmas for the McAfee twins!