Thirty days after last seeing George, Frankie wakes before sunrise and feels drawn to the old mailbox by the hedge. Inside she finds pages from George that begin as a fairy-tale version of his own life. In that story, George reveals that he first noticed Frankie as a lonely, grieving boy, that her fearlessness and attention gave him comfort, and that his attachment deepened from childhood friendship into lasting love.

Reading the story overwhelms Frankie because it confirms that George has loved her far longer and more deeply than she understood. She realizes the wild, consuming feeling she has feared is exactly what she now feels for him, and she stops resisting it. When her father finds her shaken, he reassures her that although he loves George, Frankie is free to walk away if that is what she needs; Frankie admits she does not want to leave George behind.

Later, Frankie tells her mother that she may have fallen in love with George and describes how their week in Tofino changed the way she sees him. Instead of offering instructions, her mother trusts Frankie to find her own answer. Frankie then begins a new exchange through the mailbox: she asks whether there is more, and George responds with letters from different ages that trace his feelings from an early crush to full love, including moments when he tried and failed to move on.

For five days, Frankie reads the letters in private and lets them reshape her understanding of their shared past. Finally she decides she wants all of them and goes to the hedge, where George appears holding the wooden box that contained his hidden letters. He gives Frankie the box, tells her to take whatever time she needs, and prepares to leave, but Frankie stops him because she does not want to read them alone. George invites her into the Big House, turning the old threshold between them into the opening for an honest future together.