12-year-old Luis is often lonely. He doesnat have any friends and his father, UFOlogist Armin Sonntag, is obsessed with proving the existence of intelligent life in space. He spends all night at his telescope and all day sleeping. The principal thinks Luis should be sent to a home. Then, three goofy aliens crash on Luisas doorstepa Luis quickly befriends them and hides them from his dad, who is convinced aliens are dangerous. When boarding school director Miss Diekendaker wants to take Luis away, Luis and his alien friends have to come up with a plan to contact the mother ship and get rescued. Luis is even tempted to leave his home planet with his cool new friends.