Nick is committed to his struggling jazz quartet despite the apathy of his sister, drummer Lauren, trombonist Horace and the philandering Jason. Then a tramp, Homeless Pete, shows them a lift which is actually a time machine, whisking them back to 1926 where they attract - largely unwanted - attention until aristocratic twins Victoria and Ralph book them to play at their birthday party. More concerned with returning home Nick enlists the aid of crazed boffin John Logie Baird, who accuses him of being a spy and imprisons him though he escapes to join the others at the ...