The envelope jammed in Wren's mailbox wasn't hers. Same street, wrong number: 14 instead of 41, the digits swapped by some tired hand at the sorting office. It was addressed to a woman named Cordelia, in looping handwriting. Inside, a letter began, 'Darling, I know it's been too long, and I owe you the truth.' Wren stood on her steps, holding a stranger's letter, not sure what to do.

Wren grabbed a pen. Instead of delivering it, she wrote a note back: 'This came to the wrong house. I'm number 14, not 41. But your letter sounds important, so I'm passing it along.' She slid both into a fresh envelope and walked to the post box on the corner, dropping them in before she could change her mind.

Two weeks later, a letter arrived at number 14, addressed to Wren by name. The handwriting looped just like before. 'Dear neighbor,' it read, 'I'm Cordelia. Your kindness saved a letter I'd waited three years to receive. Now I owe Theo a reply, but I'm scared. Would a stranger walk me through it?'

Wren wrote back, and soon she and Cordelia were meeting for coffee, drafting the perfect reply to Theo. When the letter was finally sent, Cordelia hugged Wren tight. 'I gained a friend out of a wrong number,' she said. Months later, Wren stood beside Cordelia as Theo arrived, and the two old loves finally met again, both smiling like the years had melted away.