From Freida McFadden, the #1 New York Times bestselling author!

She just needs to get through the night shift.

Amy, a medical student, must obtain experience on the floor of Ward D, the hospital’s mental health unit. Her coworkers are unaware that it might make her face a past she has struggled to forget.

Nightfall begins. The countdown starts.

Amy becomes more and more certain that something horrible is taking place inside the ward’s heavily guarded walls as the hours pass. Everyone on the unit is clearly in serious danger as patients and staff begin to disappear without a trace.

Amy had no desire to stay overnight on Ward D. She might not survive this time.