Meg, Calvin, and Charles Wallace leave Earth in search of Meg's father, Mr. Murry. Mr. Murry is a scientist who has been missing since the birth of Charles Wallace, Meg's baby brother. Mrs. Which, Mrs. Who, and Mrs. Whatsist, however, assist the children in their journey by helping them to tesseract or wrinkle in time. They soon discover that their father has been detained by IT. IT tries to transform people into mindless robots. Will they be able to overpower IT? Will they be able to save their father?