Lisa Mishima is having problems at school and at home when two mysterious boys transfer to her school, and she is caught up in a terrorist attack.

Shibazaki joins the team working on the Sphinx Case while Sphinx tries to confirm suspicions of their own with their next riddle.

As Lisa recuperates at Nine and Twelve's place, Sphinx sets another bomb and posts another riddle, but things don't go as planned this time.

Five takes over the battle of wits against Nine and Twelve as Lisa tries to find her place in their group, but Shibazaki isn't happy sitting by idly.

Things come to a head as Nine and Twelve go their separate ways and Shibazaki talks to Mamiya, the man behind the Athena Plan.