Secrets Beneath the Coffee Foam

After the completion of their first successful investigation, three retired school teachers can’t seem to enjoy coffee Thursdays at the garden center. Someone has started sending suspicious envelopes to their friends and neighbors. And inside – letters revealing the most terrifying secrets… As former connections begin to crumble and families break apart, with nearly every resident of the small town under suspicion, the friends decide to take matters into their own hands. And the further they progress in the search for truth, the clearer they understand that some may go too far to silence this "poisonous" pen. Is there a dangerous criminal among them once again?