Mickie Lambert creates "digital scrapbooks" for clients, ensuring that precious souvenirs aren't forgotten or lost. When her latest client Nadia Denham, a curio shop owner, dies from an apparent suicide, Mickie honors the old woman's last wish and begins curating her peculiar objets d'art. A music box, a hair clip, a keychain-twelve mementos in all that must have meant so much to Nadia who collected them on her flea market scavenges across the country. They mean a lot to someone else, too. Mickie has been getting threatening messages from a long-dormant serial killer to leave Nadia's past alone.