One night in the middle of winter, a massive solar flare reaches Earth and takes down what most of the world relies on: the grid. All at once, phones and cars are useless. Refrigerators click off and grocery store debit machines stop working. Everyone is thrust into the same boat on a sea of confusion. Things have changed forever, but no one seems to know it yet. Struggling at the edge of society, River can't escape the hardships of life as a runaway homeless teen. But a fluctuation in the sun's surface creates an opportunity for her to find freedom. But is it worth the cost she'll have to pay? José, a college student, has only one goal: to get to his sister María. How hard could it be to walk across the city during a freak power outage? As it turns out, a lot harder than he thinks because without a functioning grid, things get hectic fast. The two of them meet at a pivotal moment that starts their journey from one California city all the way to the beaches of the Pacific ocean. Together, with María and her friends, they struggle to fight against the odds in order to become one of the last of the endangered humans.