Underestimated by crooks and cops alike, three "over-the-hill" women become formidable amateur sleuths when they find themselves entangled in a decades-old, unsolved crime. Mystery writer Ellie Russo invites her cousins Sandy McCabe and Franny Baker to join her, as she travels to picturesque Orange Lake in Newburgh, New York to research a story for her newest book. Looking forward to staying in the lake house their grandmother once owned, the mini-reunion turns dangerous for these "women of an age", when they become targets of the criminals they seek to expose. Having overcome personal loss, and suffering from ailments not uncommon to older women, Ellie, Sandy, and Franny find that age has not diminished their strength or personal capabilities, and that they are willing to do whatever it takes to protect each other - including murder