As Hector, a night guard at the Museum of Natural History rushes for work, he forgets to turn off the bathtub faucet and accidentally floods New York City. His daughter Melissa comes to rescue as museum exhibits come to life. The blue whale and the giant squid push the museum towards the open ocean. Melissa dives to receive an evolution lecture from a Coelacanth fish. In the morning the museum is safely returned to its usual place, Hector closes the faucet and cleans up the mess to Melissa's amusement.