Poor Giselle, an innocent peasant girl with such a delicate constitution. Why, she could die at any time. Then, to fall in love with a nobleman disguised as a peasant, who wants one final fling before his royal marriage. It's just too much for her. Such is Giselle, the tale of love and betrayal presented by the Kansas City Ballet at 7:30 p.m. at the Lyric Theatre (1029 Central). The second act of this evening-long ballet is pretty much guaranteed to give you the willies. Or wilis, the vengeance-seeking spirits of women who were jilted and who died before their wedding day. Adolphe Adam composed the haunting score, which will be performed by the Kansas City Symphony and conducted by KC Ballet Music Director Ramona Pansegrau. Tickets cost $25 to $80. Giselle runs through Sunday. Call 816-931-2232 or see kcballet.org for more information.