One lost purse. One lost woman. A chance encounter that changes everything. Dot Watson has lost her way. Wracked with guilt and struggling with grief, she has tucked herself away in the London Transport Lost Property office, finding solace in the process of cataloguing misplaced things. It's not glamorous or exciting, but it's solitary—just the way Dot likes it. That is, until elderly Mr Appleby walks through the door in search of his late wife's purse and Dot immediately feels a connection to him. Determined to help, she sets off on an extraordinary journey, one that could lead Dot to reclaim her life and find where she truly belongs...