一个美丽而脆弱的女孩,因严重的人格障碍而被关进精神病院,这让她在端庄的好女孩苏珊和坚强无耻的桑德拉之间交换出现,富有同情心的精神科医生马克试图让苏珊摆脱脆弱而恐惧的外壳。A beautiful and vulnerable girl is confined in a mental institution due to a radical personality disorder, which makes her alternate between being the demure good girl Susan and the tough and shameless Sandra. A sympathetic psychiatrist, Mark, will try to get Susan out of her fragile and frightened shell.