Cher has never felt sibling-deprived. Like that famous poem 'you can pick your friends but not your evil step-sisters. ' And anyway, is De not the sister Cher never had? But when Cher's Dad, Mel, decides to marry a woman with a teen daughter named Tara, the harmonious Casa Horowitz turns into Crisis Central. Suddenly Cher's totally envy-worthy life is all warp-speed. Not to mention that her almost stepsister is dissing her bedroom decor. Can Cher share her personal space with someone so style-challenged? Will she bond with the sister she never wanted? Tscha! Sisterhood - virtual or biological - is very powerful!