Rumors spread when Charlie wakes up with something on his neck. A group tour of the city's most famous sights reveals more than one major secret.

On their last day in Paris, Nick introduces Charlie to his dad. Elle and Tao make it official. The truth comes out at a party that's full of surprises.

Elle keeps big news from Tao, Ben pressures Charlie to forgive him, and Isaac opens up to James. Nick invites Charlie to a tense family dinner.