Amy Green is a pharmaceutical rep who was found dead in the river. Megan finds it odd that all the blood appears to have been drained from her body. Diatoms, which relate to a group of algae, found in her system suggest that she didn't die in Philly. No, the diatoms suggest she was drowned in the Gulf of Maine. Hmm.

Bud and Sam chat with Amy's assistant, Beth, and her friend/competitor, Molly. They claim the victim was dating some mystery guy. As it turns out, Amy didn't drown. The diatoms got into system after she ate rare oysters at a restaurant owned by Chris Quinn. The guy has a buddy in TSA who helps him fly in fresh oysters every day.

Surveillance footage shows Amy meeting up with her assistant at an airport bar. Beth says she took Amy to the office of Dr. David Cryer. He's a prominent cardiologist. Everyone wants this guy's account, including the victim's friend, Molly. As far as the good doctor is concerned, he says Amy once brought him oysters because her boyfriend had a contact. Funny, Chris Quinn never claimed to be the victim's boyfriend. He now says Amy broke up with her a month ago. The guy also alibis out.