Louis' is used to a life full of events. Hell, he has 4 sisters, of course he would be! He is slightly sick of adventure, and hoped that his new job at the tea shop would slow things down. Make it easier to catch a quick breath. He was wrong.
When the shop is suddenly sold to a strange boy in a long coat, Louis finds that his quiet times are soon cut short. By what? Invasions. England, once again is attacked by aliens, and it doesn't look like his new boss is the type to just 'sit and watch'.
Will one mission with this stranger spark something in Louis? Or will it freak out our poor human boy to a point that he could go insane? "Well, what you waiting for?... Come on, then!"