Jerry Warriner spends a week at his sports club in New York City, but tells his wife he was on vacation in Florida. He returns home to find that his wife, Lucy, spent the night in the company of her handsome music teacher, Armand Duvalle. Lucy claims their car broke down unexpectedly. Lucy discovers that Jerry did not actually go to Florida. Their mutual suspicion results in divorce proceedings, with Lucy winning custody of their dog. The judge orders the divorce finalized in 90 days.