罗森是一战中意大利空军的王牌飞行员，但却被施了魔法变了一头猪。虽然变了猪，但罗森还是继续他的老本行，成了一位赏金猎人，专门打击在亚地里亚海空域作恶的空中劫匪。红猪侠一时威名远扬，令劫匪们闻风丧胆。匪徒们为了对付罗森，请来了超级飞行员卡基斯。卡基斯在于罗森对决中趁他发动机故障将其击落。罗森把飞机送到老朋友比克罗处修理时，遇上了比克罗的孙女菲欧。菲欧帮罗森修好了飞机，两人一起再度翱翔蓝天对付空中劫匪。
这时，卡斯基出现了，他对菲欧一见钟情。为了争夺菲欧的爱，卡斯罗向罗森提出决斗。于是两人再次浴血蓝空。
Porco Rosso is a veteran WWI fighter pilot turned bounty hunter, who has been transformed into an anthropomorphic pig through a rare curse. He was once known as Marco Pagot while still in his human form, but took up a new alias which suits his current image better, "Red Pig."
At the beginning of Kurenai no Buta, Porco is reunited with his long-time friend Gina at a hotel, and unexpectedly falls in love with her. Despite his strange form, Gina shows him all the affection that she can muster. But Porco has a love rival to deal with. An American ace fighter named Curtis is also after Gina's heart, and although she rejects his proposals, he is not about to let her go so easily. During his return flight to Milan, Curtis sneaks up behind Porco's plane and shoots him down. The plane is completely destroyed and Porco is proclaimed dead, but due to a stroke of luck, he barely managed to survive the crash, unbeknownst to others.
Porco must now continue his journey back by train, and suddenly discovers that there has been a warrant issued for his arrest in Italy. Not only does he need to find Gina, but he must also get his revenge and also deal with the oncoming war that threatens the whole of Europe.
