The movie follows Harry and Walter, two small-time con men in the late 1800s who dream of pulling off a big score. They decide to infiltrate a high society bank by posing as wealthy businessmen, but soon find themselves in over their heads. As they struggle to come up with a plan, they cross paths with the notorious bank robber, Adam Worth, and inadvertently become embroiled in his scheme to steal a fortune.
Meanwhile, they also meet and develop feelings for a headstrong newspaperwoman, Lissa Chestnut, who is determined to expose corruption and injustices in society. As they navigate their various schemes and attempts to impress Lissa, Harry and Walter must stay one step ahead of both the law and Worth's dangerous criminal organization.
The movie features an all-star cast, including James Caan as Harry, Elliott Gould as Walter, Michael Caine as Worth, and Diane Keaton as Lissa. With a mix of comedy, romance, and action, Harry and Walter Go to New York is a lively and entertaining caper that keeps audiences guessing until the very end.