To stand on the edge of a cliff and throw your body into the wind, one has to be willing to lose everything. Fly is an intimate portrait of three romantic couples entwined in the world's most dangerous sport: BASE jumping. The film follows Marta Empinotti and Jimmy Pouchert, two BASE jumping veterans who run a school for aspiring jumpers; Espen Fadnes and Amber Forte, a Norwegian couple navigating their relationship amidst the thrill and danger of wingsuit BASE jumping; and Robert "Scotty" Morgan and Julia Botelho, former Marine and Iraq veteran, and lawyer-turned-climber, who must balance their passion for the sport with the responsibilities of parenthood.