After her father's death, Amelia Cruikshank and her homely companion, Daisy Joy, travel to the Lion automobile factory, where Amelia will take over ownership. On the way, their car is hit by Theodore "Teddy" Blue, who designs Lion's racing cars. Teddy is unaware of Amelia's identity, however, and later remarks to a newspaper reporter that anyone named Amelia Cruikshank must be an old maid. Upon their arrival at the factory, Daisy Joy is mistaken for Amelia, and Amelia decides to continue the farce, believing it would be useful for people to think she is the secretary. General manager Dwight L. Sanford tries to convince Amelia to sell the factory under the supposition that the automobile market is in decline, but he is really working with their rival company, Ajax, whose owner Brown is trying to reduce competition. Sanford deems Teddy's car unsuitable to help Lion win the big race, which could save the company's reputation. Outraged, Teddy takes the car out and accidentally crashes it, and is fired by Sanford. With the help of Dave, the kindly office manager and Teddy's friend, "Slim," Teddy secretly rebuilds his car and enters it in the race, much to the surprise of Sanford and Brown. Ajax's driver tries to force Teddy off the track, but is unsuccessful. Teddy wins the race, only to discover that the woman he has fallen in love with, whom he believes is named Daisy Joy, has left for a cruise. He races to catch her in time, and Amelia, seeing him go, chases after him. After being chased by police at high speed, Amelia and Teddy reunite, and he is surprised to discover that she is the real Amelia.