ARCAM sends Rie, a genius professor, to Japan to decipher ancient inscriptions. When 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 a cybernetically 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.

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 calls on an old friend to help investigate an eerie island appearing intermittently on an empty ocean. Upon arriving, Yu must face his past.