On June 4th, 2004, a 63-tonne bulldozer, fortified with steel and concrete, systematically destroyed numerous businesses and homes in the small town of Granby, Colorado. The rampage lasted over two hours and resulted in more than eight million dollars in damage. Though it was armed with three high-powered firearms, no one but the driver was killed. His name was Marvin Heemeyer. Tread explores the polarising perspectives of this man, his motives, and what drove him to breaking point.