Rob Rhinehart invented Soylent, a beige liquid meal replacement of algal oil, rice protein, and vitamins, after getting frustrated with the cost and time of cooking, then lived on it alone for thirty days and turned the stunt into a company that raised $800,000 in a single crowdfunding month. Motherboard's Brian sets out to repeat the experiment himself, mixing canola oil and fish oil capsules into the powder and eating nothing else for a month while a camera follows him through the low points: the chalky texture, the boredom, the days he can't imagine facing another glass of it. He also gets real energy and focus back once his body adjusts, and the film uses that swing to ask harder questions about what Soylent actually promises, a cheaper and more efficient nutrition system built to sidestep industrial agriculture's water use and emissions. Interviews with Rhinehart and his young engineering team put Silicon Valley's disruption instincts on full display, applied this time to the question of whether food itself needs replacing.