Man With a Plan is a comedy about an old-school guy confronting the modern challenges of parenting, marriage, and family. Adam's self-assured wife, Andi, has gone back to work, forcing him to deal with the startling discovery that his three school-age "little angels" are maniacs, all the while trying to run a contracting business with his troublemaker brother, Don. In the midst of all this, Adam also has to deal with his strong-willed and opinionated father, Joe, who enjoys giving him terrible advice about how to run his life. With Andi's encouragement, and help from an unlikely friend Lowell, Adam takes charge of his brood, lays down the law, and discovers he's going to "nail" this job.
When Adam thinks Kate's boyfriend, Tyler, is a pothead, he decides to confront Tyler but doesn't get the support he expects from Andi. Also, Don tells Lowell there are office "rules" he must follow, but Lowell suspects he is making it up and threatens to bring in Adam to confirm the policies.