Introducing the three unlikeliest sleuths you'll ever meet ...Every Thursday, three retired school teachers have their 'coffee o'clock' sessions at the Thirsk Garden Centre café. But one fateful week, as they are catching up with a slice of cake, they bump into their ex-colleague, Topsy.By the next Thursday, Topsy's dead. The last thing Liz, Thelma, and Pat imagined was that they would become involved in a murder. But they know there's more to Topsy's death than meets the eye - and it's down to them to prove it ...