"IMovie star Brooks Mason tries to avoid his fans and spend some weeks on vacation. When Hawaiian plantage-owner George Smith is mistaken by Mason's fans for Mason and brought to Mason's home. They decide to change their identitiess for a few weeks. But George Smith is mobbed by Mason's fans again on a personal appearance tour in New York, Mason falls in love to dancer Dorothy March, who also is on her way to Hawaii. Problems for Mason arise due to the fact that Smith is engaged with Cecilia Grayson, and her wealthy father believes, that Smith has double-crossed him. Mason isn't able to establish a connection with Smith in New York due to his agent's orders."
"Inspired by stories about doppelgängers and identical twins such as The Prince and the Pauper, Honolulu features Young in a dual role as Brooks Mason—a top movie star—and as Hawaiʻi-based businessman George Smith. Mason is tired of being in the public eye, so when he discovers that Smith is close enough to be his twin, he arranges to switch places with Smith temporarily. When Mason steps into Smith's life, he finds himself in a tug-of-war between Smith's fiancée, and a dancer named Dorothy March (Powell), with whom he has fallen in love. Meanwhile, Smith discovers that being a famous movie star is not all that it is made out to be."