Tommy Noonan is a would-be composer, who gets hooked up with Peter Marshall, when Marshall wants to get romantic with Noonan's psychiatrist, Barbara Eden. There's a contest that Noonan wants to win, so Marshall noodges him for 25%.
There's something flat and uninspired about the classic gags that the two of them execute, and the best part of the movie are the musical interludes -- including Ray Charles doing "What I Say?" -- but Marshall seems to vanish towards the end.
I guess he got tired. Noonan was John Ireland's half-brother, and his then-sister-in-law Joan Dru introduced him to her brother, actor-singer Peter Marshall. The team had Noonan as the nebbishy zany, with Marshall as his straight man. Although they had a good deal of success in live shows and on TV, their attempt to be the new Martin & Lewis failed, and they went their own ways.
Noonan was a fair actor, with a couple of good roles, most particularly as "Danny Maguire" in the Judy Garland version of A STAR IS BORN. That apparent talent isn't on display here. He died in 1968, only 46 years old.