Thirteen-year-old Adam has made a lot of mistakes in his life, but this has to be the biggest. Thanks to a MASSIVE fight with his little brother Callum, the mysterious and magical computer algorithm Popularis Incrementum has exploded - and accidentally transported them both to a completely different world! No, not just a different world. A different dimension: one where Adam and Callum were never born and the Internet doesn't exist, and neither does any of the technology they rely on to make their epic YouTube videos! Will the brothers survive in this strange Altiverse where everything is almost like home but isn't? And how do you stop an evil villain from sabotaging your dad's world-changing technology when in this universe your dad doesn't even know who you are? But for now there's only one question in Adam's mind: how do they get back home?