Almost invisible to the people who pass him every day, the grocery lists he collects, written on everything from cancelled cheques to mortgage statements to office stationary, give him a personal hold over those who both ignore him and unwittingly disclose facets of their lives to him. In his 50s, Walt says he was abandoned by his now-missing wife Mary. When a new cold case squad is formed in St. John's to look into Mary's disappearance, the detectives begin to realize that Walt may be involved in more than just his wife's disappearance.