"As a favor, Cathy eagerly agrees to pretend she is Dan's girlfriend for the summer when their families vacation at the same beach. With a background of sun, surf and sand, they develop a friendship that is on the verge of turning romantic, when who should arrive but Lisa Kendall, Dan's old girlfriend! In three days, Lisa ruins Cathy's relationship with Dan. In retaliation, Cathy feigns interest in Steve, Lisa's handsome older brother. But soon enough Cathy learns that a fake romance can get out of hand and pretending about her feelings leads to complications she never imagined."