A story of the miraculous journey made by swimming sisters Yusra and Sarah Mardini who fled as refugees from war-torn Syria all the way to the 2016 Rio Olympics.
After the vast majority of the world's water supply is lethally contaminated, a small group of survivors who have taken refuge near a rare clean water source are thrust into a deadly game of cat and mouse and must defend their lives from infiltrators who aren't what they seem.