Ted, Marshall and Barney embark on another "trilogy time," where they get together every three years to watch the "Star Wars" trilogy and envision what their lives will be like in another three years. Meanwhile Barney and Quinn move in together.

When Lily and Marshall have a baby shower, Marshall starts to panic after realizing the baby is coming soon. Meanwhile, Ted and Robin come to terms with their relationship and Barney takes Marshall on a road trip.