It tells the story of ice sculpture artist Yan Dong who attracted the interest of a high-dimensional alien civilization from the universe - a "cryogenic artist" when he participated in the Ice Sculpture Art Festival. Inspired by Yan Dong's ice sculptures, he drained all the earth's oceans and formed a huge ice ring around the earth in orbit, thus creating a cosmic-scale ice sculpture. Dong named the ice ring "Sea of Dreams". Since then, the ocean has left the earth's surface and hung in the sky. Humanity has lost the ocean on which it depends for survival, causing an unprecedented survival crisis. Yan Dong decided to work with other scientists to overcome technical difficulties and bring the ocean back to the earth.