It is the night before the Celtic Festival of Beltane, an ancient May Day ritual, a time when the otherworldly cast is close at hand. Druids march as dark spirits rise in shadow only to be squelched by the brilliance of the light. Young maidens hang the festive boughs while the boys, blindfolded, meet on the drumlins, eating the ember cakes marked with charcoal.  Here, one unlucky fellow, with the stained piece will have to leap the flames of the bonfire three times to please the ancient tradition. Behind the cheering gaiety, two voices are heard crying out to each other. The flame of a lantern shows Jenny and Johnny, as they huddle together in a churchyard attempting to make an escape from her father’s henchmen. Their love is forbidden.   
 
The Eve of Beltane then jumps centuries into the present, where Jenny and Johnny meet again as college students at Notre Dame. While their reincarnated spirits seek to consummate their love, Jenny’s father, Derry O’Leary still stands in their way refusing to allow his daughter to marry beneath her.  Enter Dr. Kelson O’Leary, a transmigrated Merlin, who recognizes the gravity of true love. Now when Jenny brings Johnny home, the crafty professor of myth and magic helps to align the stars that allow Derry to see the fire of love that burns beyond all worldly limitation.