The drought in Southern California continues to escalate. When Arizona and Nevada back out of the reservoir relief deal, the taps run dry.  Crowds rush to nearby stores to grab water off the shelves. Soon neighborhoods are without water except for those who prepared.  Alyssa and her younger brother, Garrett, find themselves in dire circumstances when their parents do not return from seeking water at a desalination station on the coast.  Their Eagle Scout neighbor, Kelton, offers to help Alyssa find answers.  The trio is thrown into chaotic situations as the SoCal population turns desperate for water.  When it becomes apparent that help will not arrive in time from government agencies, the trio must work together to survive the Tap-Out.