Somewhere in France, sometime in the ‘90s. A group of dotcom millionaires builds the Mountain, a covert project led by Boomer—a founder equal parts charming and unhinged. Drawn by the promise of wealth and influence, young creatives flock to Boomer's ecstasy-fueled house of mirrors. As his ego swells, so does the rivalry between his protégés, Fette and Z, whose obsession grows from volatile to murderous. Ignited by drugs, promiscuity, acid house music and betrayal, a coup begins to brew amongst the ranks. But was this Boomer’s plan all along? A tale of ambition and deception, genius and imposture, THE MAN WHO BUILT THE MOUNTAIN springboards off the recent past to pry the present open and confront the tech-driven collapse of shared reality.