Beginning with a dramatization of the nightly work of an astronomer at the David Dunlap Observatory in Richmond Hill, Ontario, the documentary film shifts to focus on the workings of the universe. A journey to the stars is depicted in animation and takes the viewer to the boundaries of the heavenly bodies: the Moon, Mars, Venus, Mercury, Pluto, to the farthest regions of space beyond the reach of the strongest telescope, past the Sun and the Milky Way into unfathomed galaxies.