Meg's personal problem seems to be the loss of her father. At the beginning of the novel, Meg is quite full of teenage angst. She seems to have the typical issue of not fitting in as well as having an extraordinary relationship with her little brother. It is not long before we learn that Meg's father was a true believer in the scientific idea of a tesseract, which is where the title of the novel comes from. The word "tesseract" is simply a label given to a movement in the space/time continuum, in other words, a literal "wrinkle in time." In experimenting with the tesseract, Meg's father observed the Dark Thing, decided to fight it, came in contact with IT, and lost. This is how Meg was parted from her father. Meg's problem, however, runs much deeper than this because it is a problem concerning the Dark Thing (or complete lack of love) enveloping many parts of the universe. Meg's father is simply one of the wounded in that greater conflict. Luckily, Mr. Murry is rescued by Meg, Charles Wallace, and Calvin with the aid of a large cast of characters to help them on their journey of battling hatred, evil, and darkness with love.