After being discharged from the Army, Brian Flanagan moves back to Queens and takes a job in a bar run by Doug Coughlin, who teaches Brian the fine art of bar-tending. Brian quickly becomes a patron favorite with his flashy drink-mixing style, and Brian adopts his mentor's cynical philosophy on life and goes for the money.
On July 2, a giant alien mothership enters orbit around Earth and deploys several dozen saucer-shaped 'destroyer' spacecraft that quickly lay waste to major cities around the planet. On July 3, the United States conducts a coordinated counterattack that fails. On July 4, a plan is devised to gain access to the interior of the alien mothership in space, in order to plant a nuclear missile.