The Chase at San Francisco was a three-sided conflict of Ant-Man and Wasp trying to stop Sonny Burch and Ghost from obtaining Hank Pym's Mobile Laboratory as they were attempting to rescue Janet van Dyne from the Quantum Realm.
Ant-Man, Wasp and Hank Pym located the Mobile Laboratory and used ants to disable the machines so Ghost and Bill Foster would not be able to access the Quantum Realm. This then drew Ghost out, allowing Pym to get inside and take back the lab. As Pym began to enter the Quantum Realm, Ant-Man, Wasp and Luis were on the look out for Ghost.
As they reported in to each other, Ghost suddenly attack Ant-Man and the two began to fight. However, Ant-Man's suit continued to malfunction, causing him not to be able to escape. But this was only a distraction as Pym was successful in entering the Quantum Realm, allowing them to shrink the lab and drive off with it.