水上世界，悠然航行，心随波动，自由自在。她和年级第一我都要

　　When a local ranger in a small country town finds an unidentified algae overwhelming the town's water supply, he knows something's not right. But it's not until the sun goes down that he discovers the true extent of the danger - it seems the town is about to experience the effects of a mysterious infection that turns not only humans - but animals too - into zombies.