What's the "I" Stand For?

あらすじ

At the Wind Power Facility, Carolina and Washington continue their investigation on the Director's whereabouts and discuss his intentions on the use of the Freelancer A.I.s., while being watched by Tucker and Epsilon. Meanwhile, during a Freelancer lecture class, Maine's A.I., Sigma, takes interest on the subject of the fourth stage of A.I. rampancy: "Metastability".