Milk & Serial follows two roommates who run a popular online prank channel, documenting their antics for an ever-growing audience. When one elaborate prank is planned as a birthday surprise, what begins as playful performance quickly spirals into something deeply unsettling. As the cameras keep rolling, tensions rise, boundaries blur, and the film exposes how obsession, control, and the pursuit of content can push friendships—and morality—past the breaking point.