Set prior to the first Tekken game this prequel focuses on the events that lead up to Nina's involvement in the Iron Fist Tournament. Nina's back-story centres on a secret organisation called Kometa, Kometa wields a powerful weapon named "Salacia" and it is feared as a deadly terrorist threat. The action starts on a luxury cruise ship, where the executives of Kometa organisation have gathered in anticipation of an underground fighting tournament. To investigate the organisation, Nina Williams enters the tournament and becomes its champion.   The game begins with Nina imprisoned on the cruise ship, Nina learns that a fellow agent has gone missing, and she is ordered to ensure the success of the mission.