Schneep has built his biggest project yet but in order to test it. He needs Sean to use it. A time machine. The egos can't go through it as if something messes up, they'll disappear. Marvin and Schneep tell Sean that he needs to take back a book stole from Marvin by some time travelers but in doing so, he has to tell his past self to hide from them as they don't like his egos. But what will happen when Sean gets stuck back in the past and has to stay with himself for a while? To make this a little less confusing: Sean = Present Jacksepticeye Jack = Past Jacksepticeye