It’s 2050. Six years old Mia lives in the city of Bergen, under a glass dome, 537 meters under the sea level. Every night, the Big Light wakes her up, clean and beautiful, unlike the rest of the world underwater, which is full of trash. Mia wants to travel out of the dome to see the Big Light, but the Adults hold her back and tell her everything is dangerous out there, because it’s full of sharks. Mia escapes anyway, and finds out that neither the sharks nor the world outside the dome are as dangerous as the fearful Adults want her to believe. Gathering the trash around her with the help of her friends, she will fly up to the surface to see the Moon for the first time.