Scott Lang (Paul Rudd) is under house arrest for his actions (as Ant-Man) in "Captain America: Civil War," in which he sided with Captain America. The problem is, Captain America was officially against the U.S. government and the law, and while most of Cap's team are on the run, Scott was captured and is waiting out his house arrest by creating elaborate mazes to enjoy with his kid (they're big on the idea that Scott Lang wants to be the best Dad possible). Then he has a dream of Hank Pym's wife (Pym is played by Michael Douglas, and his wife by Michelle Pfeiffer), and breaks the rules of his house arrest calling Hank - who doesn't really want to talk to him. But inevitably Pym and his daughter Hope (Evangeline Lilly), now equipped as the new Wasp, get together with Lang and have adventures.
This is certainly the most light-weight of the Marvel series. Sure there's stuff at stake: can they retrieve Hope's mother from her thirty year exile, and they're under attack by a couple new villains (Walter Goggins as a regular gangster and Hannah John-Kamen as super-villain "Ghost"), but they keep it light with a great deal of silly comedy of the same variety we saw in the previous movie. The first movie is definitely the better of the two, but this one is still entertaining.