The narrative begins on what is described as a "beautiful day" perfect for "sailing." The atmosphere is initially tranquil, with the characters admiring how the "water looks so nice." This sets a deceptive tone of leisure and relaxation, leading the characters to decide to "anchor the boat for a little while" to enjoy the environment more intimately.
One character decides to "take a dip," prompting a conversation about swimming techniques. The dialogue reveals a playful yet instructional dynamic between the two individuals. When one character starts "doggy paddling," the other expresses surprise, noting, "I taught you how to swim." They encourage the swimmer to "do your breast stroke," but the swimmer finds it strenuous, complaining, "I get too tired." Consequently, they opt for the "backstroke" because "it's easier," while receiving advice to "try kicking your legs more" to improve their form.
As the swimmer moves away from the boat, the mood shifts abruptly. A warning is issued: "Don't go out too far." Despite the reassurance that "it's fine," the situation turns dire when the swimmer suddenly cries out, "I see a shark. Help me." The urgency of the moment is palpable as the swimmer pleads, "Bring the boat closer." The terror is compounded by the observation that "the shark is coming straight towards me."
The tension peaks as the observer confirms the proximity of the predator, stating, "It's right under you." The final utterance of the name "Kathy" leaves the listener in a state of suspense, marking a sharp transition from a carefree day of sailing to a life-threatening encounter. The contrast between the initial beauty of the day and the chilling realization of a shark lurking "right under" the swimmer serves as a reminder of the unpredictable nature of the ocean.