Buffy and her friends attend a night-time victory party, in honor of the high school swim team, at Sunnydale State Beach.
Buffy pushes Dodd off and offers Jonathan a towel, but he snaps that she should mind her own business (his anger being caused by embarrassment).
"[1][2] He turns to see that all that remains of Dodd are his clothes and skin, while a monster rises from the mess and departs into a storm drain.
Principal Snyder witnesses this and threatens Buffy not to harm their chances of a victory in the state championship.
They discuss Angelus' behavior, and speculate that the swim team may be taking steroids—which repel vampires, but attract gill monsters.
Buffy hears Gage cry out in pain; she finds him and a teammate in the locker room, transforming into two more of the creatures.
Buffy and Giles tell Coach Marin that members of his team are not being killed by the creatures, but are transforming into them.
It is revealed that Nurse Greenliegh is a co-conspirator with Marin; they have been conducting experiments on the swim team with fish DNA, in order to enhance the Razorbacks' performance.
When Nurse Greenliegh insists they end the experiments, Marin forces her into an open grate leading to the sewers.
[4] Roger Pocock condemned the simplistic drugs-are-bad theme: [D]rama needs to say something more than that, because if the message is just "drugs are bad", then the only two responses from the viewer can be "yes, they are", or "no, they're not".
To Marin, "women are disposable, and he gets angry with them when they fail to show the proper school spirit and don't enjoy being victimized."
Being a former Queen Bee, Cordelia thinks that popular boys and girls deserve more than the "common wuss."
Theresa Basile lists it among her "10 Underrated Episodes of Buffy the Vampire Slayer," calling it a "silly one-off" which "has the misfortune of being placed between "I Only Have Eyes for You" and the epic "Becoming" two-parter, and it suffers in comparison to those transformative stories.
Cameron, Principal Snyder and Coach Marin would've rued the day they ever crossed or blamed Buffy.
"[13] Billie Doux called it a "completely silly and ridiculous episode jammed sideways into a season of spectacular Angel heaviness," with an enjoyable "transparent, over-the-top condemnation of athletes using performance-enhancing drugs and sliding through school without having to study.