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Seattle, 1933. Single mother Vera Ray kisses her three-year-old son Daniel, puts him to bed and goes to work the night shift at the local hotel. She returns to find that a May blizzard has covered the city in snow and her boy has disappeared. On the frozen street, Vera finds his favourite teddy bear, and the snow covers any trace of her son or the perpetrator.

Seattle, 2010. Claire Aldridge, a reporter for the Seattle Herald, is assigned to write about the May Day Blackberry Winter (a late spring cold snap) and its double from the past. She learns about a kidnapping that has never been solved and vows to find the truth. It turns out that there are many unexpected parallels between the lives of these two women....