Rebecca Mathis is a sex therapist. One of her patients is found dead. At first it is presumed he died of a heart attack, but it was murder. The detective investigating the murder falls for Rebecca... is he now in danger ?

In the beautiful underwater reefs off the coast of Florida's pastoral Pajaro Island, a fissure rips open in the ocean floor. When graduate student Greg Chambers encounters the seismic readings, he rushes to tell his professor, Anthony McAlister. Greg suspects that a massive earthquake is about to give the small island a rude awakening. To make matters worse, the epicenter is right under Pajaro Island's new resort, where Anthony's estranged wife Lynn is working. As they drive to warn Lynn, the quake tears through the small town, damaging downtown and leveling several homes. The bridge connecting the island to the mainland is wiped out. Lynn and three others are trapped underground in the resort's utility tunnels. When Greg is killed during a rescue attempt, Lynn is forced to rally the survivors to try and save themselves. With aftershocks tearing through the site, the tunnels growing more and more unstable...

Alan and Wendy Barnet have been married just long enough for the excitement to have gone out of their relationship, and they're looking for a way to put some spice back in their lives. After placing a personal ad looking for another couple interested in swapping mates, the Barnets are led to the Zebra Lounge, where they meet Jack and Louise Bauer, a pair of seasoned erotic adventurers. While the Barnets find the swinging scene exciting at first, they soon decide it may be doing more harm than good to their marriage. But easing the Bauers out of their lives proves to be neither simple nor safe.