ARCAM sends Rie, a genius professor, to Japan to decipher ancient inscriptions; after she gets kidnapped, a young Spriggan agent comes to the rescue.
ARCAM uncovers a mysterious wooden boat in the snowy Turkish mountains; Yu must face off against an enhanced child who holds the key.
Yu must investigate a cursed forest and search for Soma, the mythical nectar of immortality; he teams up with unlikely allies to find a way out.
Yu attempts to retrieve an out-of-place artifact when it falls into the wrong hands; however, the enemy gets away, awakening the deadly object.
Tragedy strikes when Professor Kawahara tries to protect an ancient artifact more potent than a nuclear bomb; in response, a vengeful Yu heads to Egypt.
Yu asks a friend to help investigate an eerie island appearing intermittently.