Full Metal Panic! The Second Raid

Three months after the original series Mithril learns of a secret organization that has technology able to counter the ECS (Electronic Conceal System) mode. The organization, known as Amalgam, has access to Black Technology, which was obtained from the Whispered. Like the other intelligence agencies, Amalgam intends to obtain more. Sousuke's mission to protect Chidori is terminated by Mithril, instead leaving her in the care of an anonymous agent known as Wraith.