Gus has a secret girlfriend that he has been keeping from Shawn but is finally ready to introduce him to Ruby. Shawn's first impression of her is a good one, but he insists on meeting her friends to vet her further. So he forces Gus to crash what he thinks is a picnic with Ruby and her friends Jessica, Derek and Stu. But the guys soon learn they have walked into a river-rafting trip instead. Ruby is thrown at first, saying there is not enough room, but then relents and hooks them up with gear. Shawn thinks Ruby might be hiding something, and uses his "psychic" abilities to break the ice with her friends by "divining" Stu is the most experienced of the group. Gus uses a more direct approach and asks how they all met. Ruby says Derek and Stu met at a Wildlife Preservation meeting, which is ironic because Derek was a big game hunter back when he dated Jessica, who is Ruby's work colleague. What binds them all together is their interest in extreme sports. The group then hooks strobe lights to their vests in case they get separated. Shawn and Gus realize they are on a white water trip just before they hit the rapids, and they hold on for dear life. When they come out the other side, they realize Stu is missing.