The game is the spiritual successor to "Portopia Renzoku Satsujin Jiken". A man's corpse is discovered near a sea wharf in Tokyo Bay. The player must investigate the victim's identity and learn about related events in Hokkaido. A 2nd and 3rd murder occurs one after another while the player starts investigating with Shunsuke Saruwatari, a detective from the Kushiro station. The player must discover the criminal's motivation. An examination of the relation between the victims exposes a important details from the past.

from http://strategywiki.org