While investigating terrorist activity on the distant colony world of Sedra, Jameson Locke and his team are caught in a horrific biological attack that exposes them to a much deeper danger.
To provide some context first: This short was filmed as camera tests with Neill Blomkamp, who was at some point considered to do the HALO Movie. All you see here are basically just camera tests he did during his trial runs.
Animated series adapted from the original book, Halo: The Fall of Reach. It's an explanation and backstory of the shaping and creation of Spartan 117, The Master Chief.