Ryder Hendrix didn't know much about Ben Tennyson other than the fairly-obvious things everyone else knew. The countless times he'd saved the universe and beyond from when he was just a child, his fearsome reputation amongst the criminal underworld, and most importantly, the source of unfathomable power that rested upon his wrist. He viewed Ben as he did his own father, which in Ryder's case, wasn't exactly a good thing; both men were distant, unreachable, unrecognizable and quite frankly unlikable. The last word would have been an assumption, given that all the sixteen year old student had of his father were swiftly-fading memories, and the briefcase hidden away in the attic of his household.
So when this world renowned superhero vanishes during one of his missions, and Ryder uncovers evidence to suggest Ben and his father were connected in more ways than just those bitter similarities, he finds himself equipped to embark on a quest to rescue the multiple-time saviour of the multiverse, accompanied by allies old, new, and those ever present in the timeline. And the threat they face will shake the people of the world and all that has ever existed to it's very core.
DISCLAIMER : I don't own any aspect of the Ben 10 franchise. I own only this plotline, and the OCS; the Hendrix family, Riley Tennyson, and Leviathan. The newer aliens and their abilities are also mine, so please don't steal (these being Titanus and Lock Ness.) And the future timeline I will be utilising draws elements from each variation of Ben 10K seen in each series, including my own; this particular iteration is one wherein Ben is married to Julie Yamamoto rather than Kai Green.