Tesseract: The shortest distance between two objects is NOT a straight line...
MISSING Mr. Murry
Meg Murry, a high school misfit who lives with her mom Mrs. Murry and smart little brother Charles Wallace, has a good IQ, but it doesn't reflect in school, where she gets bad grades and lots of trouble.
Mr. Murry, the children's father, has been missing for years after getting lost while attempting to tesser (wrinkle through space-time) to Mars. This has caused problems for the whole family.
Charles, I love you!
Meg and Charles Wallace meet Mrs. Whatsit, Mrs. Who, and Mrs. Which, who tesser them to the planet Uriel, to show them the Black Thing, the darkness being fought off by them and others.
Charles Wallace is under IT's spell, and brings Meg and Calvin to Father, where Meg uses Mrs. Who's glasses to free him.
After tessering to the planet Ixchel, The group meets some beasts who take care of them. Meg decides she needs to go save Charles from IT, and she brings him back with love.
With the help of the three Ws, the family safely tessers back to Earth, and everyone is reunited.