Ursula is a story about a young prince named Miro, and the girl he befriends and falls in love with when they were children. When she turns 11, she has to go away to a "special school", and they are separated. The prince never forgets her, though, and when he becomes an adult and is expected to assume his father's throne and choose a wife, he sets out to find her again and make her his. Complicating things is the fact that Ursula is actually a fairy princess, and to cause a fairy princess to fall in love is, shall we say, somewhat risky. Miro and Ursula (accompanied by Miro's right-hand man Boris, who provides some needed levity) go through an metaphysical odyssey of sorts, and I'll leave it up to you to find out if they live happily ever after.
Art-wise, this is impeccably drawn. Moon and Ba (I'm still not sure who does what, pencil/ink/script-wise) nimbly skip between whimsical fantasy and stylized reality apparently without effort. I'm reminded somewhat of Baz Luhrman's re-imagining of Romeo & Juliet in its mix of the contemporary, grandiose and idealized. The iconic graphics of the star and tree, or the cartoonishness of the scenes with the pair as children, along with their bird, Pip, couldn't be more different, style-wise, from the scenes with Miro as an adult and his father...but they all fit together seamlessly.