Two young scientists are working at the outer ends of the oceans foodchain on a shared mission: to keep the earths biggest ecosystem alive. The great white shark is killed by millions every year, but without it, the Oceans will die. On the other end of the foodchain, at its very base, Phytoplancton is protecting our atmospheres oxygen supply. Understanding its reaction to ocean warming and ocean Acidification is key to understand and predict climate change. How much longer will we be able to breathe?