Imagine a kingdom shrouded in permanent wintry gloom, its young king grown crabbed and selfish in his dark castle. But liberation is at hand in the form of a gardener-errant determined to restore the kingdom's purloined flora to its rightful home--a heroine whose comrades include acrobats, aerialists, rope walkers, jugglers, mimes, and a canine gymnast. The Flower Thieves, which premiered in 2001 at the Metropolis Performing Arts Centre, is G. Riley Mills and Ralph Covert's musical fable, an allegory of springtime rebirth, brought to splendid life by the Midnight Circus in this tightly integrated spectacle of movement and imagery. Returning to the cast are Mitchell J. Fain and George Fuller as the melancholy monarch and his jester as well as Julie Greenberg and Jeff Jenkins, leading the army of botanical rescuers. Beverly Arts Center, 2407 W. 111th, 773-445-3838. Opens Thursday, April 3, 8 PM. Through April 6: Friday, 8 PM; Saturday, 2 and 8 PM; Sunday, 2 PM. $25.