Emma is a girl who likes to be in control. When she tries out for the local La Voltige (equestrian vaulting) team she meets Cassandra, a strong, attractive and vivacious girl. As they get to know each other they share a sense of wicked fun and quickly become best friends. But feelings of jealousy, competitiveness and sexual attraction have them pushing each other to their limits. As Emma spends more time away from home with Cassandra, little sister Sara begins to discover her own sexual identity, all the while pining for affection from a reluctant babysitter.