In Ancient Japan, an eyepatch-wearing young boy named Kubo cares for his sick mother in a village. A spirit from the past turns Kubo's life upside down by re-igniting an age-old vendetta. This causes all sorts of havoc as gods and monsters chase Kubo. In order to survive, Kubo must locate a magical suit of armor once sought by his late father, a legendary Samurai warrior. He also gains some allies in Monkey and Beetle.