Anthony P. Kirby (Edward Arnold)’s Timeline and Summary

Mr. Kirby returns from Washington, DC, where he has gotten assurances that his monopoly deal will not be blocked.
He is going to buy all the property around Mr. Ramsey's factory, forcing him to close, and then Kirby will have a munitions monopoly.
One person won't sell though, so Kirby tells his agent, Mr. Blakely to force the sale.
Meanwhile, Kirby's son Tony wants to marry his secretary, Alice Sycamore.
Kirby doesn't want his son to marry Alice, but is humoring him.
Kirby and his wife go to meet the eccentric Sycamore family for dinner. It is a disaster, with fireworks explosions, and they all end up in jail.
In jail, Kirby discovers that Grandpa Vanderhof is the one who won't sell.
They all get out of jail, but Alice is so mad at the Kirbys' snobbery that she breaks up with Tony and runs away.
Vanderhof agrees to sell the house, and so Kirby has his deal.
Tony tells Kirby that he's going to leave his job as vice-president. Mr. Kirby is very upset that Tony is going away.
Kirby leaves the bank and goes to Grandpa for advice.
The two play a harmonica duet, Alice and Tony are reconciled, and Kirby gives Grandpa back the house.
Kirby and Tony are reconciled as well, which makes Kirby very happy.