After witnessing something not quite possible, even for their line of work, Sam and Dean end up having to put up with a tag along until they can find out a way to send him back home. After all, how hard can it be to send twenty year old Cal Leandros back through a portal to his alternate universe without risking both worlds crashing in on each other? Demons to left of them, Auphe to the right… and one very pissed off Niko desperate to get his brother back.