You live in an apartment building in the fictional Canadian town of Pinebrook. Your neighbour, Tessa, has reserved the shared community room for her son's birthday on Saturday afternoon. You also booked the room for a quiet study group at the same time, and the building manager confirms that your booking was entered first. Tessa says she has already invited twelve children and asks you to cancel your study group. Your classmates have an important course presentation on Monday, and several of them cannot meet at another time.