A shy girl who wants to be popular (Kristy McNichol) attends a pirate festival in her seaside community, featuring a swordplay demo led by a cute hunk (Christopher Atkins). After selecting Mabel (Kristy McNichol) to participate in the demo, the instructor invites her aboard his boat for a real ride on the high seas, at which point a gang of her catty acquaintances latches on for the trip. Sent to get hamburgers for the outing, Mabel is 'accidentally' left behind when one of her 'friends' pulls the anchor prematurely. Determined not only to fit in, but to track down her dream guy, Mabel steers a tiny sailboat into stormy waters in pursuit, and gets shipwrecked. Thus begins a fantasy in which the unconscious Mabel imagines herself in a real pirate adventure, complete with her dashing pirate hero and a legion of his crusty shipmates, with dozens of unwed sisters who must rise to the altar before she can.