Since losing her goggles in swimming class as a child, Ji-young has been afraid of water. Even now as an adult, Ji-young, who cannot open her eyes underwater, is anxious about her final swimming test and future career. She finds out that Soo-kyung, a precocious high school student who she tutored, has goggles and tries to borrow them, but Soo-kyung is not home on the day she promised to lend them. Soo-kyung, who ran away from home, dreams of an emergency on the rooftop in the rain that night, and Ji-young is still wandering in the water in her dream, unable to open her eyes.

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