When Billie's grandpa falls ill, her parents go to take care of him, while she and her new puppy Travis go to stay with her aunt. Billie is worried about her grandpa and she's glad to have Travis with her. But the puppy is anxious about the unfamiliar surroundings and a long period of rain and thunder leaves him terrified.

Then just as Bille and Travis begin to settle in, the entire neighbourhood is flooded, with Travis stuck at home on his own. Will anyone be able to rescue him in time?