Lucy and Ethel go into business making salad dressing based on Lucy's Aunt Martha's recipe. Their advertising on a local TV show looks like a success, but when Ricky finds that they're losing money on each jar, the girls have to find a way to get their customers to cancel their orders.
Lucy and Ricky put on a big act for a magazine writer who wants to do an article on the 'real' Ricardos. The writer spends the day with Lucy and plants seeds of doubt about Ricky's fidelity. A stunt by Ricky's publicity agent makes it looks like he is cheating on her.
A former classmate of Lucy Ricardo has done very well for herself, and now heads up a charitable drive for their alma mater. She contacts Lucy for a donation, and Lucy attempts to impress her old classmate by exaggerating her wealth and status. Soon Lucy and Ethel both find themselves in debt to this woman by five hundred dollars each, and in their desperation, they take stunt jobs as "women from Mars" to promote a new movie.
Lucy thinks Ricky is not paying enough attention to her and might be tempted to see other women. Lucy puts on a black wig to pretend to be someone else that can tempt Ricky. Her plan does not work out the way she wants.
When Ricky gets a long-term gig in Maine, the Ricardos sublease their apartment for two months. When the gig is canceled, the new tenant refuses to give up the sublease. Lucy and Ethel try to force the new tenant to leave.
After Lucy gets several months behind in all the bills, Ricky hires a no-nonsense business manager who puts her on a strict budget. Lucy comes up with a scheme to get some extra money that soon has her rolling in cash.
Convinced that his wife never likes the presents he buys for her, Fred asks Lucy to secretly find a birthday present for Ethel on his behalf. Lucy agrees, and later is with Ethel when she happens to find the gift-wrapped package in a closet. Ethel is less than excited about it, complaining that Fred has a history of giving her horrible gifts. Lucy urges Ethel to sneak a peek at what's inside. Reluctantly unwrapping the gift, Ethel pulls out a pair of strange-looking pants, gives them a quizzical glance and exclaims, "Well, he's done it again." Lucy hides her dismay, ...