2016. Social worker Jessica Campbell sorts through her mother's belongings after the funeral. In the basement, she makes a shocking discovery: two dead girls curled into the bottom of Donna's deep-chest freezers. A pair of teenaged sisters had lived with the family in 1988 as foster children: Casey and Jamie Cheng from Vancouver's Chinatown. After six weeks, they disappeared; social workers, police officers, and Jessica herself assumed they had run away. As Jessica unearths complicated truths about her mother and the girls, she is forced to take stock of own life--her grief, a job she hates, and her tedious but safe relationship.