It is relatively unknown that in 1941 in Vermont, the first in the world megawatt-size wind turbine on Grandpa's Knob, was connected to the local electrical grid. The 1.25-MW Smith-Putnam wind turbine was erected in Castletown, Vermont. It had two blades 75 feet in length. Incredibly, it took aver 40 years before this feat was once again accomplished. The documentary focuses on how this came about.