Murder.com

Stacy is a high-powered South Beach lawyer who returns home when her estranged sister, Kate, is killed by an unknown assailant. Taking the investigation into her own hands, Stacy is shocked when she discovers Kate's secret online profile on a tacky dating website. Stacy weathers dangerous encounters with various men, ranging from the charismatic to the sympathetic to the downright seedy. In the process, she uncovers disturbing revelations about a sister that she barely knew.