A viral clip of Lake Minnewanka's shoreline, offered online as proof the water shows no curvature, sets off this film's search into flat earth belief. The camera follows believers gathering evidence at lakes, horizons, and long sightlines, testing the claim that the water's surface stays perfectly flat over miles. Interviews trace how individual viewers moved from doubt to conviction, watching amateur experiments with levels, lasers, and telescopes that they present as disproving a curved planet. The film sits inside the community rather than outside it, recording flat earth meetups, arguments over which experiment counts as definitive proof, and the frustration of proponents when mainstream science dismisses their footage without engagement. Rather than staging a formal debate, it lets the reasoning and the counterarguments play out largely through the believers' own words and footage, giving a firsthand sense of how the movement recruits and sustains itself. It ends without resolving the physics, leaving the viewer to judge the lake footage on its own terms.