In other words

A love story should never be something you forget.
Jane and Arthur meet through "a perfectly calculated, masterfully executed romantic plan" —she's French, he's English— and somewhere between a spilt drink, shared jokes and a dance, they find a language of their own. A perfect story.
Until one day, Arthur forgets milk and stamps. Small things—until they're not, and become the first crack in a life they knew by heart.
Some love stories are meant to be found again and again.