In the early 1970s, a young French street performer and wire-walker named Philippe Petit dreams of performing a high-wire walk between the newly constructed Twin Towers of the World Trade Center in New York City. Inspired by the spectacle and challenge, he meticulously plans his venture, devising an elaborate scheme to gain access to the towers and complete the walk. With the help of a diverse group of accomplices, including his girlfriend Annie, photography enthusiast Jean-Louis, and mentor Papa Rudy, Philippe hones his skills and begins the intricate preparations needed to turn his vision into reality. The film showcases Philippe's determination, rehearsals, and elaborate security breach.

As the project progresses, Philippe and his team face numerous obstacles, including technical difficulties, limited financial resources, and the looming threat of detection by authorities. Philippe's passion and charisma drive the group forward despite growing tension and several close calls. The narrative builds suspense through their efforts to stealthily transport equipment, secure key locations inside the World Trade Center, and rig the wire across the towers. The story culminates as Philippe prepares for his audacious walk high above the streets of New York City, embodying his dream against seemingly insurmountable odds.