As the usual working montage breaks out, the boys get straight to work on their Fun Color Changer Ray, ending their song, asking where Perry was. We find Perry lying in his bed, and as he puts his hat on, the bed turns over and takes him to his secret lair. He runs over to his egg chair in front of the large monitor with Major Monogram and Carl.
"Agent P, your entries are beginning to disappoint. Not like the last time, though. Let's try a little more," Major Monogram says with his gruff voice.
"Ah, come on. He's trying and he's put in a lot more overtime with that overnight bust of Doofenshmirtz," Carl says, trying to defend the agent.
"Well no matter, that's beside the point. Anyway, Doofenshmirtz has purchased an excessive amount of chocolates, roses, scrap metal, and a suit, and we all know that can't lead to anywhere good. Go put a stop to it," Major Monogram finishes, sending the agent off.
The boys continue their works on the ray, surprisingly without the disturbance of their older sister Candace. Even though they had been inventing the day away, she did not care, because she was off on her six month and two day anniversary with Jeremy. They were spending the day at the Danville Park, with a picnic and everything. She swore to Jeremy that she would not think of busting her brothers for the day.
Back at home, the gate door to the backyard was slightly cracked open, leaving Isabella an opportunity to peak in. As she entered, Phineas looked up for a split second and saw she had done something differently with her hair, she curled it. Don't get distracted, don't get distracted, must work, must work, Phineas thought to himself, returning to his work while fumbling.
"Whatcha doin'?" Isabella asks in her cute, high-pitched voice.
"Building a ray that changes the color of natural things," Phineas says with a shakiness in his voice.
"Oh cool! So you could change the sky to, like, purple? Or the grass to yellow?"
Ferb lifts his head from his work, realizing Phineas had said the same thing merely half an hour ago. He was rather shocked at how Phineas had not realized how similar Isabella and he were. They were practically meant for each other. It didn't even phase his brother, which rather surprised Ferb.
"Yep yep!" Phineas chirps. "And…done. Let's give it a test, eh Ferb?"
And with that said, Ferb pulls out an apple, and puts it in the direct aim of the laser. As he activated the laser, a rainbow ray was shot at the apple. Within a matter of seconds, the apple had turned from a bright red to a sky blue. Ferb then makes his way over to apple, grabs it off of the pedestal, and takes a bite out of the once-red apple.
"And it's still safe to eat. Nice! Let's try this on some other stuff," Phineas added, trying to calm his nerves when he realized Isabella was a mere two feet from him, and his breathing became short patterns and hands became damp with sweat.