When his 8-year-old son is abducted, a widowed crime writer looks to his estranged father, a retired former police detective, for help, only to discover a connection with the decades-old case of a convicted serial killer known as "The Whisper Man."

During a bitter 1964 Massachusetts winter, young secretary Eileen becomes enchanted by Rebecca, the glamorous new counselor at the prison where she works. Their budding friendship takes a twisted turn when Rebecca reveals a dark secret — throwing Eileen onto a sinister path.