Challenges of impending parenthood turn the lives of five couples upside down. Two celebrities are unprepared for the surprise demands of pregnancy; hormones wreak havoc on a baby-crazy author, while her husband tries not to be outdone by his father, who's expecting twins with his young trophy wife; a photographer's husband isn't sure about his wife's adoption plans; a one-time hook-up results in a surprise pregnancy for rival food-truck owners.
In Just Go With It, a plastic surgeon, romancing a much younger schoolteacher, enlists his loyal assistant to pretend to be his soon to be ex-wife, in order to cover up a careless lie. When more lies backfire, the assistant's kids become involved, and everyone heads off for a weekend in Hawaii that will change all their lives.
When mankind beams a radio signal into space, a reply comes from "Planet G", in the form of several alien crafts that splash down in the waters off Hawaii. Lieutenant Alex Hopper (Taylor Kitsch) is a naval weapons officer assigned to the ship USS John Paul Jones, part of an international naval coalition which becomes the world's last hope for survival as they engage the hostile alien force of unimaginable strength. While taking on the invaders, Hopper must also try to live up to the potential his brother Stone (Alexander Skarsgård) and his fiancée's father, Admiral Shane (Liam Neeson), expect of him.