Hayao Miyazaki is one of those artists that needs no introduction, a brilliant storyteller whose characters and richly-developed stories include tales of flying pigs and walking castles, forest gods and floating cities, preschooler mermaids and fantastical bathhouses. So even when nobody really knew what the plot was, “The Boy And The Heron” was already an alluring prospect.

And while perhaps not his most accessible film, it’s nevertheless a gripping piece of work – half semi-autobiographical tale of a young Japanese boy during World War II, half fantasy story about a strange fantastical world of long-forgotten family secrets. It often feels like Miyazaki is musing on the exquisite yet flawed process of creating a fantasy world, the unique minds that nurture them, and the creativity that future generations should have.

During World War II, a young boy named Mahito Maki (Luca Padovan) loses his beloved mother in a terrible hospital fire. A year or so later, his father Shoichi (Christian Bale) marries his late wife’s sister Natsuko (Gemma Chan). Mahito isn’t pleased by this – including the fact that his aunt/stepmother is pregnant – and he definitely isn’t happy to be moving to her remote country estate. His schoolmates are hostile, and the only company in the house is the bickering elderly servants.

But he soon finds himself fascinated by a strange grey heron living in a pond nearby, and a strange stone tower that everyone warns him away from. When Natsuko wanders off and disappears, Mahito is drawn into the tower by the heron (actually a little man in a magic suit), who lures him with the promise of finding his mother again.

Instead, he finds himself in a strange fantasy world dominated by oceans and stone monuments, of blobby little spirits and a pyrokinetic girl named Lady Himi, who fends off hordes of talking pelicans. With the heron-man as his companion, he finds that his stepmother has fallen into the clutches of a civilization of talking, meat-eating parakeets – and to help her, he may have to take on responsibility for the entire world.

“The Boy And The Heron” is not Hayao Miyazaki’s most accessible film in many ways. It’s one of those films that may be a little confusing on your first viewing, but which increases in richness with subsequent watchings. It’s also one of those stories that lends itself to multiple symbolic interpretations, the most obvious – in my view, anyway – being that the existence of the other world is symbolic of a creative mind constructing its own universe in the process of storytelling, its flaws, and the need for younger creatives to take up the mantle.

And those mysteries and schemes are coiled around a hauntingly melancholy fantasy story – the world Mahito encounters is oddly empty despite its beauty and strangeness, like a vast cathedral with no people in it. It has an edge of wrongness and danger that always makes you feel like the hero is balancing on a knife’s edge, even from things that seem like they should be ridiculous (the man-eating parakeets are surprisingly unnerving). But even in that, Miyazaki works in some fun moments as well, such as Shoichi thinking Mahito has turned into a parakeet, or when Mahito has to deal with the heron-man.

And because this is Hayao Miyazaki, the entire story is lusciously animated – this is 2-D animation at its peak, distinctively Studio Ghibli in style, and detailed to the point where you can practically feel the frogs, the mossy stones, the feathers, the creaking wood. Miyazaki crafts visuals that are hauntingly beautiful and dreamlike, allowing Mahito to drift through strange, sometimes ethereal landscapes populated by strange creatures.

Mahito is a slightly weak spot in an otherwise lovely movie, simply because he’s much less expressive than many of Miyazaki’s other heroes. We know that he desperately misses his mother and isn’t happy about his father’s marriage, but it’s hard to tell what his exact emotions are much of the time, or how they will naturally lead to actions like constructing a bow-and-arrow. Fortunately he opens up more once he travels into the other world, especially when interacting with the exuberant Lady Himi (whose true identity is pretty easy to guess), the tomboyish Kiriko, or the heron-man (whose weird, slightly sinister and sometimes pathetic personality is a good contrast to Mahito’s more restrained one).

The English voice acting is uniformly good in this film, with actors such as Christian Bale, Dave Bautista, Gemma Chan, Mark Hamill and Willem Dafoe all giving excellent performances. Special shout-out to Robert Pattinson, who immediately earns his voice-acting cred by giving an excellent performance in a creaky, slightly sinister voice that sounds completely unlike his usual voice – watching the movie, you completely forget who’s performing the role, and just lose yourself in the voice-acting.

“The Boy And The Heron” has a few rough spots, but it’s still a strikingly lovely, symbolically-rich fantasy adventure that leaves you feeling melancholy yet hopeful. May Miyazaki give us more worlds to explore.