The Jonas Brothers are back and ready to kick off their world tour with a huge concert at Radio City Music Hall! But since the brothers haven't performed together in over three years, and since so much has changed in each of their lives, Kevin worries if they still will have that same spark. And since family is always first, the couple plans a send-off dinner at their home, bringing both the Jonases and the Deleasas together under the same roof since their wedding! Will Dani finally be able to impress her mother-in-law? And will things still be the same with the Jonas Brothers?