An attack on Lady Eunice's carriage separates Ditronus's most noble children from the empire. Zenith, Tobias, and Jericho, Ditronus's strongest knight. With fatal injuries and assassins on their tail, our protagonist Zenith faces a cruel dilemma. Back in Ditronus, an unfortunate misunderstanding occurs. A brother who regrets. Another who is skeptical. Who has left this world and who continues walking on it? It is impossible to know unless they too take the difficult road in reaching zenith.