One snowy evening, wounded WWI veteran Jasper Pritchard arrives at Valentine Nugent’s sweet shop with an unusual request. Jasper’s deceased great-aunt has left him a fortune, along with a box of indiscreet letters she wants returned to the writer, and the only clue is a tin sold in Valentine’s shop over twenty years ago. As they search the shop’s records and uncover a love story from long ago, they find far more than the answer to the mystery.