Seonho is not a wealthy person, but he is an ordinary courier who lives happily. He was delivering as usual, but happened to be at a delivery place 10 years ago when he was in high school. He meets Jun-goo, who used to bully him. Seonho was relieved to see Jun-goo who didn’t recognize him. Traces of the murder are found in his house, and the fact that he is a witness is revealed. Seon-ho, caught by Jun-goo, runs errands for Jun-goo again as he did 10 years ago…