Young vivacious Billie uses her charms on influential businessman Glenn Abbott in hopes of getting her secret fiancée Gil a diplomatic appointment. Meanwhile Gil’s affections meander to beautiful ingenue Kentucky, Billie’s best friend.

Snagglepuss glows with noble sentiments after reading the fairy tale of the mouse who saves the lion. So he is quick to free a mouse named Bigelow from a trap. Bigelow is officiously and overwhelmingly grateful.

Gaira, a humanoid sea beast spawned from the discarded cells of Frankenstein’s monster, attacks the shores of Tokyo. While the Japanese military prepares to take action, Gaira’s Gargantua brother, Sanda, descends from the mountains to defend his kin. A battle between good and evil ensues, leaving brothers divided and a city in ruins.