Barney Stinson is...a pig to say the least. He's slept with countless girls, always wears a suit, and lives his life by his beloved playbook. He is also never one to back down from a challenge. When Barney is challenged by Lily to get a certain girl at the bar to go home with him, he is surprised to find that the charms he's used many times before aren't working. A simple petty bet brought the crew a new friend. But what if she's more than that? What if this girl can actually change Barney Stinson?