Set roughly two months after the events at the Tuatha de Danaan, the series continues the story of Full Metal Panic! The Second Raid. Mithril discovers a clandestine organization called Amalgam that has developed technology capable of countering the Electronic Cloaking System (ECS). Amalgam also possesses “Black Technology” obtained from Whispered, as Kaname Chidori does, and intends to acquire more of it. When Mithril terminates Sousuke Sagara’s mission to protect Chidori, Amalgam’s plans appear to proceed unhindered. The series is based on the Full Metal Panic novel *The End of Day by Day*.