What鈥檚 the best place to hide a disco diva who just witnessed a mob hit? In a convent, of course! Delores Van Cartier takes cover and dons a habit, but she can鈥檛 quite live up to the rigid expectations of Mother Superior. When she brings her disco talent to the convent choir, the word 鈥渟ister鈥� takes on new meaning as the public, the press 鈥� and the mob 鈥� take notice.