Master Chief Petty Officer John 117 was a SPARTAN II Super Soldier of the United Nations Space Command and a well-known hero in the Human Covenant War. His assassination of the Prophet of Regret causing the alien race called the Sanghelli or Elites led by Arbiter to be betrayed by the other the Prophets and they joined forces with the humans in their campaign in the Ark. After the Prophets and the parasitic Flood were eradicated, Master Chief and Arbiter were in the frigate Forward Unto Dawn. Only the front half of the frigate took Arbiter went through the Slipspace portal taking him back to Earth, but the back half of the frigate that had Master Chief did not make it. Therefore, Master Chief was presumed dead by the U.N.S.C. after Arbiter transpired the events happened. The super soldier lost in space went into cryo sleep after his artificial intelligence companion Cortana activated a distress beacon.

After years of space drift, Cortana abruptly alerted the super soldier. "Chief! Wake up!" Cortana had Chief thawed out.

"What is it?" the super soldier asked as he woke up.

"We crash landed onto Earth, but the communications system of this ship malfunctioned."

"Then we'll have to find the U.N.S.C. on our own," Master Chief took Cortana's chip and put it into his helmet.

When the hatch of the ship opened, there was a black-haired man in his early 30's wearing a lab coat labeled InGen. "Welcome, stranger, to Isla Sorna," the scientist greeted.

"Isla Sorna? I haven't heard anything about this," Master Chief spoke in disbelief.

"I suppose that you're from the future, aren't you?" the scientist raised a question based on the spaceship.

"I come from the year 2552. Is this planet Earth?"

"Yes, the year is 2003."

"I can't believe we drifted through time," Cortana muttered.

"Is there something I can do for you?" Master Chief asked the scientist.

"I have a mission for you. Follow me," the scientist led Master Chief and Cortana to a structure that was functional. Chief took a seat while Cortana's hologram was up after the super soldier took her chip off from his helmet and the scientist started the projector showing the map of Isla Sorna. "Coincidentally, a cargo plane belonging to the company I work for, InGen, has crash into this island at the same time your spaceship did. The plane's cargo is full of dinosaurs' DNA Capsules," he pointed to a spot he marked as the crash site.

"Dinosaurs?" Master Chief muttered in disbelief.

"From what I know here, dinosaurs are already extinct long ago after the end of the Cretaceous period," Cortana spoke with what she knew.

"Despite of that, InGen is able to bring back dinosaurs by cloning using their DNA. Due to the crash and explosion, these capsules are scattered throughout the island. I need you to recover these Base DNA Capsules to recreate dinosaurs," the scientist turned the projector to show an image of a canister full of green fluid in some forest.

"So you want me to explore this island to recover the missing Base DNA Capsules?" Chief asked.

"That's right. When you bring back the Base DNA Capsules, I'll see what I can make out of them. Be warned that this island is full of wild dinosaurs and you can only bring back one Base DNA Capsule at a time."

"Where would you want me to go as a start?"