Henry is a bit of a 'Lady Killer' and his playboy antics are about to land him in trouble! Wendy, the girl who is secretly in love with him, finds out what he's been up to, and she tells a Little Lie.

A little lie that turns into something much, much bigger!

Henry is to undergo a Petticoat Period in order for him to understand what it's like to BE a GIRL. Given to Miss Greenfield for the rest of the school year, Henry has to be her daughter until his family is willing to welcome him back.