From the back of the adventure booklet:
"MORE THAN A LEGEND! THE TRUE TALE OF THE MAKING OF A KING! Relive the magnificent saga of a bastard lad named Arthur.... Hear the crowd gasp as he draws Excalibur from the stone. Witness the boy's phenomenal rise to power, and discover the startling secret of Merlin's magic.
SAVOR THE GLORIOUS BATTLES OF ROUND TABLE KNIGHTS, the dark treachery of Morgan Le Fay, and the romantic treason of Quieen Guinevere. But beware. The aliens have invaded Camelot. Like an insidious disease, they threaten to destroy all of Arthur's England... an England that must become legendary if Earth shall endure!
CLASH OF KINGS! is a special TIMEMASTER(tm) adventure in which the Time Corps agents travel back and forth through a fantastic Arthurian history, unraveling an alien plan so devious that even Merlin himself is bewitched. You must have the TIMEMASTER game to play. Inside, you'll find maps, character cards, and hours or role-playing fun. You'll also find the outstanding artwork by Aubrey Beardsley, rendered for Malory's LE MORTE D'ARTHUR in 1893."