“NEVER TRUST ANYONE UNDER SEVENTY-FIVE!”<br><br>That's the motto of the Gladdy Gold Detective Agency. Don't laugh: having solved a case of serial murder, Gladdy and her eccentric neighbors are building their reputation between canasta games and pool exercises–hunting down everything from lost pocketbooks to missing octogenarians. And when a jealous woman sets them after her wayward husband, and a flasher strikes their retirement complex, two seemingly unrelated cases collide with a third: a series of dastardly murders targeting Florida's wealthiest wives. <br><br>But when the girls win tickets for a luxury bingo cruise, they hit the jackpot. Because this ship is carrying not only Florida's fiercest bingo competitors but also a killer–and it's up to Gladdy and her friends to stop him before one of them becomes his next victim….