Tanner Quimby, a spirited twenty-one-year-old college dropout, finds herself in need of a roof over her head, leading her to reluctantly take a job as a live-in caregiver for Louise Wilt. However, Louise, a fiercely independent 84-year-old with a penchant for vodka and crosswords, is determined not to be babysat. The odd couple begins an uneasy cohabitation that takes a dramatic turn as Tanner uncovers startling clues pointing to Louise's possible involvement in one of the country's most significant jewelry heists. The discovery propels them into an unplanned escapade, racing against their pasts and toward an adventure that could redefine their futures. 'The Mostly True Story of Tanner & Louise' is a heartwarming and humorous tale that reaffirms the bonds of friendship and the unexpected paths life can take.