The child-to-adult story of Yeonjun- The Fourth Generation Hitboy. Rough beginnings of star-wishing and gun-shooting blossom into newfound opportunities for Yeonjun. A mysterious man with odd-coloured eyes offers him the chance to be a saviour-- a hero-- the person who stands up and does something. But as Yeonjun finds out from trying to protect Kai, the silent boy at the orphanage, everything in life comes with a price. Chained by ten years of grief, guilt, revenge and love-- a twenty-three-year-old Yeonjun commits to dying for his cause. As he makes his final wish upon his star, he finds it granted to him, but with it, receives far more than he ever bargained for.