I'm trying to write a book that takes place within one room throughout the whole story but idk what should take place. Anybody have any suggestions about what the story could be about?

Perhaps a teenager who gets trapped in a room and has to find themselves a way out, only to have it be a major puzzle that is still to be unlocked at the end and then it ends? Or perhaps it could be symbolism for loneliness, depression, anxiety, how you feel trapped and scared and alone?