Cee wakes up on an abandoned island. Her only companion is a protective and agreeable robot. Her sister Kasey is a long way away on Earth''s last unpolluted zone. Kasey wants to escape from the home she thought she trusted and the science that sees her questioning her reality and her future. She has choices to make. Big choices. Kasey thinks Cee is dead, Cee knows Kasey needs her. Encountering everyone from robots, to climate experts, competitive scientists and mysterious castaways, the connected siblings find their paths to each other through the fallout of a dying planet.