Things get really crazy… that's like, crazier than usual, which just goes to prove that the universe really must be composed of infinite possibilities… when Kagura's father shows up in Edo to visit his daughter. Oh, and he's also in town to take on the deadly alien menace that he might be on the trail of. When Yakuza takes on Aliens, who will lose? The innocent bystanders of course. And needless to say, Kagura's associates respond to her possible (and not particularly voluntary) exit from the franchise in predictable fashion: by trying to grab female lead status for themselves. Meanwhile, Sadahara discovers a devilish aspect of his own personality while becoming a demon, which leads to inevitable difficulties with the High Priestess types. So what's Gintoki doing during all this? Dodging, mostly. Japan's hottest anime series continues as aliens on the loose and underemployed samurai make total assassins out of themselves in the insanity that is GINTAMA COLLECTION 4!