A woman who wakes up every night at exactly 3.33AM, in the middle of the so-called devil's hour between 3AM and 4AM.

A woman keeps waking up every night at exactly 3.33 AM, in the middle of the so-called devil's hour between 3AM and 4AM, for seemingly no reason. A social worker and a mother to her strangely detached son Isaac, Lucy Chambers keeps getting deja-vu, and visions of things that have never happened. At the same time, police are investigating a seemingly random chain of murders that somehow connect to Lucy and her son Isaac.