Broken Age is a timeless coming-of-age story of barfing trees and talking spoons. Vella Tartine and Shay Volta are two teenagers in strangely similar situations, but radically different worlds. The player can freely switch between the characters and their individual stories, helping them take control of their own lives, and dealing with the unexpected adventures that follow.

As the game begins, Vella is chosen by her village to have the honor of being sacrificed to the terrible monster Mog-Chothra, but having no interest in being devoured by a horrible beast, she decides to go against ages old tradition and escape.

Meanwhile somewhere in space, Shay is living a solitary life under the care of a very motherly computer, and while his every need is taken care of in every way imaginable, he wishes for nothing more than to break free from the monotony and have some real adventures.