At a political demonstration, Leo, a twenty-year-old man, is struck so severely by a hard rubber bullet from the police that he falls into a coma and dies. In their grief, the parents take very different paths. While the mother founds an organization for personal rights and uses it to challenge the police investigation report, the father tries to uncover what kind of life his son had been living since he moved out a year ago. While clearing out the former children's room, he discovers a strange, old music box that turns out to be a planned package bomb. In his search for the people who were in contact with his son, he delves deeper into the digital battle between big data corporations and anti-globalization activists, in which Leo had participated as a hacker. As the father becomes increasingly estranged from his wife,.