Phineas & Isabella accidentally gets hit by Adam's molecular separator ray which causes them to have two different personalities - Romantic Phineas & Isabella and Busy Phineas & Isabella, so Adam, Ferb & the gang have to figure out a way to put them back together again. Adam is a bit nervous when he meets Romantic Phineas & Isabella. Meanwhile, Dr. Doofenshmirtz tries to get over his fear of high diving, but he figures that if he can't, he will just use his "Look-away-inator 2" to zap everyone so that they do not witness his shame.