Master Chief has been trying to cope with the loss of his AI, Cortana, the captain has just sent him to rescue professor Moon from the Promethean Sinister king of all Prometheans, but as they were fighting, master chief was sent back in time to the day of his grandfather, IRONTRON. With the help of his friends Dead Shot, Shadow, and his grandmother Go-go Tomago, he will find that not ever thing has a happy ending. As master chief and IronTron battle the world most deadly monsters, the Kaiju, but as master chief and his grandfather were hanging out by the shores of Tokyo there came a portal but this was no teleporting portal, then coming out of it was a category 5 knife head. As IronTron and Master Chief were heading back, Master Chief fell unconscious but when he woke up he found that he was back in the lab of Benjamin Moon watching dead shot destroying sinister once and for all!