Humans have migrated from Earth to the L planet group for about 1,500 years. Earth, now the birthplace of humanity, is subject to strict security controls and is a special place that can only be visited once every four years by designated spacecraft. Luna is living a quiet life on the planet L77 when she is visited by a childhood friend who wins a ticket on a spaceship to Earth. Can Luna and her friends pass the boogie test and reach Earth?
