Yang has been cursed to live a life of immortality. After ending the 100-year battle 3000 years ago by killing the head witch that had been leading the revolutionary army, he'd been cursed by her on her last breath to a life of immortality. At first, he thought it was a blessing in disguise until his loved ones begun passing away due to a plague, and he tried everything to pass on with them, yet the curse stopped him from dying. Now he runs around stopping crime and stating away from , until he meets you, you seem to remind him of someone from his past.