A car crash involving only underage teens inexplicably sends Lin Yu-Hsuan's "Little Fish" back to a past he'd rather forget. Was it a near-death out-of-body experience or a leap into a parallel universe? Meanwhile, the goddess-like "Annie" Chen An-Fei stirs up a whirlpool of emotions among her four friends, as they dive back into the mysterious "pond" to uncover more unexpected surprises.