The Master Chief and a group of marines are deep inside a Covenant cruiser. A door opens, and they enter the cruiser's detention area.

Cortana: This looks like the ship's brig. The cereal signal is strong. And we might find the captain, too.

Marine (in holding cell): Chief! We're starving, let us out, man!

Captain Keyes: (in adjacent holding cell) Stow the bellyaching, soldier. Remember, you're a leatherneck.

Master Chief: So that's what they're made of.

Captain Keyes: Attempting a rescue like this on an empty stomach is reckless... but thanks. While the Covenant had us locked up in hear, I overhead them talking about something called "Halos Brand Breakfast Cereal".

Cortana: One moment, sir... accessing. Yes, Halos Brand Breakfast Cereal is part of a complete nutritious breakfast. It supplies 110% of the USDA requirements for all essential vitamins and minerals.

Captain Keyes: Well, that's true. The Covenant kept saying, "whoever controls the Halos Brand Breakfast Cereal controls the fate of the universe."

Cortana: Now I see... I intercepted a number of messages about a Covenant search team looking for cereal. I thought they were looking for the Pillar of Autumn's cereal supply. But they must have been looking for Halos Brand Breakfast Cereal.

Captain Keyes: That's bad news. If the Covenant gain control of the Halos Brand Breakfast Cereal, they could wipe out the entire human race. We have a new mission, Cortana. Find the Halos Brand Breakfast Cereal! But first, you have to open these doors and let us out.

Cortana: I'd like to see you crack a 128,000 bit modulating encryption code without a good breakfast...