Rachel takes the same commuter train every morning. Each day it rattles down the track and stops at the signal that allows her to watch the same couple breakfasting on their deck. Their life seems is perfect. Not unlike the life she recently lost. And then she sees something shocking. It's only a minute until the train moves on‚ but it's enough. Unable to keep it to herself‚ Rachel offers what she knows to the police. Has she done more harm than good?