Rachel (Caren Pistorius) is separated from her husband and currently raising her young son, Kay (Gabriel Bateman), by herself. The divorce discussion has exhausted Rachel. She overslept and was about to be late, but she happened to run into a traffic jam on the highway. It was a green light, but Rachel was stopped by a large truck parked in front of her. Rachel, who lost her patience, honked the horn wildly, but she didn't know that she had annoyed the truck driver (Russell Crowe). The truck driver ordered Rachel to apologize for her impoliteness, but Rachel refused. At this time, Rachel didn't realize that she had set herself on fire. The truck driver was a mentally ill patient who had just set fire to his ex-wife and her family who wanted to divorce him. He swapped Rachel's mobile phone and began to conduct a human flesh search and crazy revenge on her.