Is watching tons of old mysteries on TV enough to make you a detective? A trio of octogenarians thinks so. Naomi Hale, Henry Gumm, and Marva Sanchez spend their leisure time at Seaside's Golden Shores Retirement Villa in front of the tube with BritBox on full blast, "sleuthing" along with Morse, Lewis, Dalgliesh, and Agatha (Raisin, not the other one). There's a rash of petty crimes at the villa, as cash and jewelry seem to be missing-or is it just the residents' poor memory? The local police are called in, but their investigation yields no results. Naomi, Henry, and Marva have theories, but then their prime suspect goes missing. That mystery seems to be over before they can act, as he claims he was kidnapped...but then there's another kidnapping, putting a new friend in danger.Can the "Silver Sleuths" solve all these riddles?