The realm of magic is being threatened by the realm of logic, so Carolinus, the green wizard decides to shield it for all time. Ommadon, the evil red wizard, stands in his way. Carolinus then calls for a quest that is to be led by a man named Peter Dickinson, who is the first man of both the realms of science and magic. It is Peter's job to defeat Ommadon.
This movie contains 1 potentially triggering events.
There is a discussion wherein a character explains that he vowed to fall in love with a now adult character when she was only 5 and he was a full grown adult. However, it is framed within the context of chivalry or an arranged marriage, and the character does not express any actual attraction to children.
There is a scene in which a sound akin to chattering insects is played for an extended period of time. The sound can be upsetting to listen to, and within the context of the narrative the sound drives those that hear it to acts of irrational anger and, eventually, insanity.
An Asian character is known as the Gold Wizard (ie an Asian character being associated with the color yellow) and is given a somewhat stereotypical representation, but the representation is overall positive and, for the time that the movie came out, the representation would have been considered fairly progressive.
A character is implied to have drowned in the past, but his on screen appearances all happen exclusively after he had been brought back to life and he is never shown drowning or struggling to swim.
The Red Wizard implies that he will inspire humanity to create the atom bomb, at which point a mushroom cloud explosion is shown on screen. No further representation of a nuclear explosion or its aftermath is shown.
There is one underwater scene, but the animation does not make it seem like the characters are underwater, and no characters within the scene are shown to have any difficulty breathing.
An character had vowed to marry another character when she was 5 and he was a fully grown adult, but it is framed more in the context of a chivalric arranged marriage and the male character never expresses any attraction to the female character when she is either a child or an adult.