Team Galaxy is about a group of friends who try to balance both their school work and their free time. The three protagonists, Yoko, Josh, and Brett, are among the students of a school called Galaxy High, a galactic justice authority, which defends the galaxy against criminals. The school teaches subjects suitable for these types of missions, which their students endure. The series apparently takes place during the present day, but in an episode where they go through a time skip, a calendar says that the year is 2051, hinting that the actual series takes place in 2050.