According to Wikipedia, which is quoting Zack Snyder, SUCKER PUNCH is:
Set in the 1950s, it tells the story of Baby Doll (Browning), who is trying to hide from the pain caused by her evil stepfather and lobotomy. She ends up in mental institution and while there she starts to imagine alternative reality. She plans to escape from that imaginary world but to do that she needs to steal five objects before she is caught by a vile man. She has 5 days to escape before being lobotomized. In order to cope with the situation, she enters the hyper-real world of her imagination, and the lines between reality and dream begin to blur. She is joined with friends who are inmates from the institution. Lessons learned in the said fantasy world could help the girls escape their real-world fate.It also helps that the characters are life-sized hormonal wet dreams. Not mine, but I appreciate the aesthetic eroticism. Here are four from six posters [as the missing two did not catch my fancy].