The secrets of the Whispered have been revealed, but that knowledge has only brought new danger. Leonard has retreated to Merida Island, where he seeks to rewrite reality itself with Kaname by his side. And with Mithril's forces already aching and depleted, Amalgam has occupied a Soviet missile base—with the intent to trigger worldwide nuclear war! It's a two-fronted battle on Merida Island and the mountains of Afghanistan for the penultimate volume of Full Metal Panic!

Relates the adventures of Sosuke, a trained operative from a secret organization and a high school student.

Sagara Sousuke isn't your typical high school student. He reads military enthusiast magazines; he responds to questions with "affirmative;" he brings grenades to school in his bag. Though everyone at school takes him for a hopeless military geek, Chidori Kaname thinks there might be something more to him. When their plane is hijacked in the middle of a field trip, Kaname's instincts will prove correct: Sousuke is an elite, mech-piloting mercenary... and he's here to protect her!

While on vacation, Chidori Kaname is invited to a Pacific island by Sousuke Sagara, the world's biggest war nut. She is really excited--until she finds out Sousuke isn't planning a relaxing tour of nature, but a high-speed adventure full of thrills, chills, and danger. Young adult.

What could be more romantic than Christmas Eve on a cruise ship? That's what Kaname is thinking when her school decides to schedule a make-up class trip... at least, until Sousuke declares that he's made other plans. He'll soon find that he's needed, though, as the ship finds itself beset by half-hearted terrorists, killer robots in the hold, and worst of all—a wannabe hero who's seen too much Die Hard! With the specter of Amalgam hanging over everything, can Sousuke probe the mystery behind them, while also keeping Kaname safe from harm?

The battle at Niquelo ignited in Sousuke and Kaname a new passion to find each other, but the rest of the world won't make it that easy. While Sousuke fights, waiting for the operation that might bring her back to his arms, Kaname endures new trials at the hands of a jealous tormenter. Everything comes to a head in an abandoned Soviet research town, and the winding tunnels beneath it—tunnels that hosted a catastrophe seventeen years ago, and which might hold the secret to the Whispered themselves!

Clouseau and Mao lead the charge in Afghanistan to prevent nuclear war, while Sousuke and Tessa invade Merida Island, intent on stopping Leonard and his world-changing TARTAROS device. With resources depleted and the very world changing around them, their desperation to find each other is all they have left. Will Kaname awaken from her nightmare? Will Sousuke get through to her in time? Will anyone survive?! All bets are off in the explosive final volume of Full Metal Panic!