Soaked, nay, marinated in the world of vintage Hollywood, Tell-All is a Sunset Boulevard-inflected homage to Old Hollywood and a hilarious assault on celebrity. Hazie Coogan has for decades tended to the outsized needs of Katherine "Miss Kathie" Kenton, a larger-than-life star who has survived multiple marriages, career comebacks, cosmetic surgeries, and emotional dramas. But danger lurks with the arrival of a gentleman caller, Webster Carlton Westward III, who worms his way into Miss Kathie's heart and boudoir. Hazie discovers that this bounder has already written his celebrity tell-all memoir, which foretells Miss Kathie's death in a forthcoming Lillian Hellman-penned musical extravaganza. As the body count mounts, Hazie must execute a plan to save Katherine Kenton for her fans-and for posterity.