With varying degrees of success, recently divorced friends Dave, Vic and Donny are trying to move on with their lives. Vic feels vilified by his ex-wife's parents, while Donny has a shaky bond with his teen daughter, Emma. Dave, meanwhile, has an enviable problem -- he has more dates than he can handle. As they confront their post-marital challenges, the men take solace in one another's plights.
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.