Numerous skeletons are discovered on the tracks of a shut train terminal. However, one of the dead targets strolls into the police station. Where did all these dead bodies come from, as well as who is devoting all of these murders? The world divided right into two on the evening of a murder 12 years earlier, as well as Do Won chases the hidden truth in the identical cosmos. This drama shows the contrast between two various worlds, divided by 2 different choices.