Beneath the Heavenly Realm's War God sits a divine beast, its true form being an ancient soul-devouring mysterious hound. Because its bloodline power is too special, it is feared by the Heavenly Realm; its memories and divine power were sealed, and it could only accompany its master in the posture of a spiritual hound. Later, it accidentally fell into the mortal world, gradually recovering its memories, uncovering its life background during the journey of pursuing the past, and finally shouldering the mission of guarding the Three Realms.