340 tons of monolithic granite, an ad hoc means of transportation, 11 days on the road, 22 cities involved, 107 miles crossed: all this is “Levitated Mass”, an art rock star, as artist Michael Heizer defined it. By ‘levitating’ an enormous boulder and installing it over a hole in the ground in the park around MACMA, Los Angeles, he created one of the most imposing Land Art works extant. The film interweaves the artist’s biography with behind-the-scenes footage of the work’s creation (the piece was conceived in 1968), the dreams of an important museum and its reception by a city, whose astonished populace observes the transportation of this incredible load through the streets of California.