Young man Nathan (Taylor Lautner) has a seemingly perfect family. He has lived in a happy environment since he was a child. However, since he was sensible, Nathan always felt that he was living a life that was in vain. Until one day he accidentally saw someone looking for him on the missing persons webpage. Staring at his childhood photos on the monitor, Nathan realized that his "parents" who had been with him day and night had a special identity. Nathan realized that he had been living in a carefully woven lie for more than 20 years. Nathan was ready to find out the truth. He knew that his so-called "parents" were not trustworthy at all, so he could only tell his neighbor Karen (Lily Collins) about it. Just as Nathan and Karen wanted to figure out what was going on, they were unexpectedly chased by a professional killer. His "parents" were killed in front of their eyes. The police hunted him as a murderer, so Nathan and Karen could only start a thrilling escape career, and he was also on the run, getting closer and closer to the truth...