Librarian Phoebe Cotton lives with misophonia. The sound of other people crunching an apple, slurping their tea or snapping chewing gum fills her with a rage that she buries deep within.

Mortified by her 'Not Quite Right' brain, she hides away inside 6 Salmon Street, the family home that her formidable grandmother Dorothy has abandoned for a more convivial life at the Western Retreat Retirement Village. But when Phoebe begins receiving mysterious postcards in the mail, she slowly, but surely, finds herself being pulled back out into the world and towards Monty, the sweet postal clerk.

Across town, Suze, a university student with a high distinction in study avoidance, is clinging to the hope that the neglectful J might actually be her boyfriend. When J's attention turns to Ky, it sets Suze on a path that leads her to 6 Salmon Street and Phoebe Cotton.

Together with Suze and Monty, Phoebe goes on a mission to solve the mystery of the postcards but ends up finding much, much more, including acceptance, strength and love.