Melissa and her sister Kate don't get along. Total opposites, Melissa is the sexy bad girl who drops out of sight for months while Kate is the responsible older sister who has her life on track. But everything goes horribly wrong for Melissa when she witness the murder of her rich boyfriend by a gang of unknown assailants. Narrowly escaping with her life, Melissa runs to Kate for help who turns her away after all the trouble in the past. Soon Kate finds herself threatened by thugs looking for Melissa and, realising the seriousness of the situation, enlists the help of a new friend to help find Melissa before the killers do.