When a decaying Russian satellite crashes on the island, the Professor uses a key component for a barometer. With that device, he learns that a massive wave is going to swamp the island. In desperation, the castaways lash their huts together into one structure in order to have any chance to ride the disaster out.
A detective is hired to locate a girl adopted 30 years earlier whose birth father wants to bequeath her his fortune.
Out of work swing band maneuvers a gig working for a political campaign, by drawing in and entertaining prospective voters at rallies. The candidate is really a stooge for a corrupt political machine, which discovers the band's handsome and appealing singer would make a better stooge. Meanwhile, romance blossoms between the band's singers. When election day approaches, the band's singer wants out of the campaign, but the machine threatens to smear him and his pals in the band if he quits.
The new boarder at a Washington, D.C. rooming house for women likes the fast life, but her recreational activities lead to her involvement in murder.