Taking place at roughly the same time as the original Mobile Suit Gundam, MS IGLOO follows the exploits of the Principality of Zeon's 603rd Technical Evaluation Unit, a special crew of weapons development researchers. Stationed aboard the former civilian cargo ship Jotunheim (named after the land of the giants in Norse mythology), the unit field-tests various prototype weapons for combat use under the supervision of Engineer Lieutenant Oliver May. IGLOO's six episodes chronicle the 603rd's adventures at pivotal episodes throughout the One-Year War.