<P> Mrs Whatsit, Mrs Who, and Mrs Which turn out to be supernatural beings who transport Meg, Charles Wallace, and Calvin O'Keefe through the universe by means of tesseract, a fifth - dimensional phenomenon explained as being similar to folding the fabric of space and time . Their first stop is the planet Uriel, a Utopian world filled with Centaur - like beings who live in a state of light and love . Mrs Whatsit herself shows that she, Mrs Who, and Mrs Which are all these centaur - like creatures in disguise as humans . There the "Mrs Ws" reveal to the children that the universe is under attack from an evil being who appears as a large dark cloud called The Black Thing, which is essentially the personification of evil . The children are then taken to visit the "Happy Medium", a woman with a crystal ball through which they see that Earth is partially covered by the darkness, although great religious figures, philosophers, scientists, and artists have been fighting against it . Mrs Whatsit is revealed to be a former star who exploded in an act of self - sacrifice to fight the darkness . </P> <P> The children then travel to the dark planet of Camazotz, which has "given in" to the Black Thing . Meg's father is trapped there . They find that all the inhabitants behave in a mechanistic way and seem to be under the control of a single mind . At the planet's central headquarters (described as CENTRAL Central Intelligence), they discover a telepathic red - eyed man who can cast a hypnotic spell and claims to know their father's whereabouts . Charles Wallace deliberately looks into the man's red eyes, allowing himself to be hypnotized in order to find their father . Under its influence, he takes Meg and Calvin to the place where Alexander is being held prisoner because he would not succumb to the group mind . </P> <P> The planet turns out to be controlled by an evil disembodied brain with powerful abilities, which the inhabitants of Camazotz call "IT ." Charles Wallace takes them to the place where IT is held . In such proximity to IT, the children are threatened by a possible telepathic takeover of their minds . With special powers from Mrs Who's glasses, Alexander is able to "tesser" Calvin, Meg and himself away from Camazotz, but Charles Wallace is left behind, still under the influence of IT . Dr. Murry, inexperienced at tessering, does not know how to protect Meg from the Black Thing which surrounds the planet as they tesser through it, nearly killing her . When they arrive on the neighboring planet of Ixchel, Meg is nearly frozen, and paralyzed . Calvin and the Murrys are discovered by the planet's inhabitants - large, eyeless "beasts" with featureless faces, tentacles and four arms, who prove both wise and gentle . Meg's paralysis is cured under the care of one inhabitant, whom Meg nicknames "Aunt Beast ." Meg overcomes her anger at her father for leaving Charles Wallace on Camazotz, realizing that parents can't fix everything, and sometimes children can solve problems themselves . </P> <P> Then the trio of Mrs Whatsit, Mrs Who, and Mrs Which arrive . They charge Meg with rescuing Charles Wallace from IT, because only Meg has a strong enough bond with him . Their father had last seen Charles Wallace when he was a baby and Calvin had only just met him . They each give her a gift . Mrs Whatsit gives Meg her love . Mrs Who quotes to Meg a passage from the Bible about God choosing the foolish of the world to confound the wise, and the weak to defeat the strong (1 Corinthians 1: 27 - 29). Mrs Which tells Meg that she has one thing that IT does not have but doesn't specify what it is . Upon arriving at the building where IT is housed, Charles Wallace is still there under IT's influence . Meg realizes that the one thing she has that IT does not is love . She focuses all her love at Charles Wallace and is able to free him from IT's control . Mrs Who, Mrs Which and Mrs Whatsit tesser the Murrys and Calvin back to Earth . In the vegetable garden they are all reunited with Katherine and the twins . Mrs Whatsit says that although she and the others like the spectacle of the family reuniting, they have to go somewhere . Before Mrs Whatsit finishes her sentence, she and the others disappear . </P>

Where does it live in a wrinkle in time