Retired schoolteachers Liz, Pat and Thelma are back at their usual table at the Thirsk Garden Centre caf with a brand-new mystery to solve ... Curious white envelopes have been delivered to friends and neighbours. Inside are letters revealing the deepest secrets they have tried to hide. As one by one, careers are ended, marriages destroyed and no one is beyond suspicion, the three friends decide enough is enough. They must take matters into their own hands before more damage is done. But as they work to uncover the truth, they begin to wonder just how far someone will go to silence this poison pen ... Could a murderer be in their midst once again?
