Ant-Man and the WaspSave

We open with a flashback. 1987. Hank Pym, Janet van Dyne, and the original Ant-Man / Wasp team are on a mission to disarm a Soviet nuclear missile heading toward the U.S. Hank's suit fails. He shrinks Janet to subatomic size to disable the missile's circuits — she succeeds but gets trapped in the Quantum Realm. Hank presumed her dead. He spent thirty years living with the guilt.

Cut to: present day, two years after the events of Captain America: Civil War (2016). Scott Lang is on house arrest at home in San Francisco for breaking the Sokovia Accords by helping Steve Rogers. He has three days left on his sentence. Hank and Hope have been on the run since Civil War as well — they have built a portable quantum tunnel in their lab on wheels, hoping to extract Janet from the Quantum Realm.

Scott has a dream about Janet that confirms her consciousness is reaching out to him. He calls Hank. Hank and Hope reluctantly bring Scott in. They need a black-market quantum-circuit component to complete the tunnel and extract Janet. The component is being held by Sonny Burch (Walton Goggins), a Bay Area gangster, who has just sold it to a mysterious figure named Ghost (Hannah John-Kamen).

Ghost is the daughter of a former SHIELD physicist named Elihas Starr, killed in a Pym-Particle accident in the 1980s. Ghost's molecular structure has been unstable her entire life — she phases in and out of physical existence, which is killing her. She wants Janet's quantum-energy signature to stabilize herself. She is willing to kidnap Janet, killing Hank's wife in the process, to save her own life.

The chase across San Francisco involves Hank's mobile lab repeatedly being miniaturized and tossed around by Scott (Hope's wasp suit allows her to fly and shrink-grow as needed). Scott's suit malfunctions and randomly switches him between giant and ant-size at the worst possible moments. The film's most-discussed action sequence is a chase down San Francisco hills with a Hot Wheels miniaturized car going giant-size mid-traffic.

The climax sees Hank successfully extract Janet from the Quantum Realm — at the cost of nearly dying himself. Janet appears as an older woman with quantum-energy embedded in her cellular structure. She heals Ghost with a touch — sharing her quantum signature without sacrificing her own life. Ghost stabilizes. Hank and Janet are reunited after thirty-one years of separation. Scott returns home in time for his house-arrest review the next morning.

Two minutes later, the post-credits scene. Hank, Janet, and Hope are operating the quantum tunnel with Scott shrunk-down inside the Quantum Realm collecting healing particles for Ghost. Then the Snap happens. Hank, Janet, and Hope dust in front of the controls. The tunnel powers off. Scott is trapped inside the Quantum Realm — which becomes the central plot of Avengers: Endgame (2019), where Scott emerges five years later having only experienced five hours.

Ant-Man and the Wasp grossed $623 million globally — a modest improvement over the original. The film's heist-comedy register and Hank-Hope-Scott family dynamic established the franchise's identity. The mid-credits sequence directly seeded Endgame's entire premise — Scott Lang as the unlikely architect of the Avengers' return.