While everyone else may have been worried, Isabella was probably the saddest to hear the news. A million questions began to flood her mind about Phineas. About what Candace's future children had called her. About what was coming in a manner of just a few days.

"Well...", Baljeet began, now understanding he couldn't deny the truth of the fact. "if.. if you're gonna die, Phineas. Is there anything we could do to help you with it?"

"Yeah.. Cause, cause we don't want you to die and have regrets.", Isabella said, trying hard to blink back some tears.

Phineas was silent for a moment, unsure of how to react to much of anything let alone what he wanted to say. After a moment's thought, he finally had it in his mind. He looked back at Ferb with a clear look of determination set in his eyes.

"Ferb.. I know what we HAVE to do today.", he said. "Or at least.. what I have to do."

-68 HOURS REMAIN-

The kids were steady at work. Phineas had wanted to complete every Summer plan he had made with Ferb. Every invention. Every possibility and so far, they were even further than Phineas had intended. Candace was soon on the trail when Phineas came into the house. She paused from her conversation on the phone as she sniffed the air.

"...PHINEAS!", she yelled, marching into the kitchen where Phineas was making some lunch for his friends. "Why is the smell of motor oil on you this time?"

"Hey Candace. Don't really have a lot of time to talk. The gang and I are making as many inventions as we could before the end of the day.", he said quickly putting the sandwiches together. "You're welcomed to help us if you wanna."

He began to head for the door with the tray but Candace had caught him to a halt before he could get to the backyard.

"What's that on the back of your head?", she asked curiously.

"Oh. It's my death date.", Phineas explained. "I've got until then to live."

"Ha ha ha, yeah nice joke.", she said sarcastically. "Now what's it really?"

"No, Candace. I'm serious.", Phineas said, feeling the weight of his heart as he reminded himself. "I'm.. I'm gonna die in three days. Ferb checked it and everything."

Candace's eyes slowly opened wide as the news sunk in. Her brother? And he was DIEING?

"What?", she asked. "But-! But you're only 10!"

"Yeah, I know. That's what I said.", Phineas sighed. "But it's true. My molecular structure is decaying away quickly even as we speak. Like someone just sped up the life-span of my molecules or something."

Tears quickly came to Candace's eyes as she felt the stab of the truth.

"Oh my gosh...", Candace said in half a whisper.

Phineas simply hung his head and walked back out, dishing out the sandwiches as he walked by his friends. He picked up his screwdriver and was getting ready to get back at it when Candace's voice was heard.

"Phineas!", she called out and ran over.

"Yeah?", he said, turning around.

"What can I do to help?", she asked, honestly.

Phineas gave a smile and began to tell what they were to do. The hours passed and dinner time was quickly coming up as they had finally finished everything.

-62 HOURS REMAIN-

"It's a good thing everything could fit into our mini-sphere.", Phineas was saying as they cleaned up the backyard.

"You know, this was actually kinda fun.", Candace remarked as she stuffed their crazy water slide into the small sphere on the ground. "I'm actually sorry I don't do this sorta stuff more often."

"Ugh, yeah but my arm's are kinda sore from all the hard work.", Isabella said as she rubbed her arm. "It's gonna be nice to get some rest. Phineas worked the hardest."

"Well you know, I'm wanting to get it done soon.", Phineas smiled but then looked back at the sphere. "But you know.. It's weird. We've built everything we could imagine, but I don't really have that...accomplished feeling. I mean I have it, but not.. not quite as strong as I thought I would. I dunno. I guess no one could really feel ready to die."

Everyone sighed a bit, at the mention.

'Should I tell him? Right now, while I still have a chance?', Isabella wondered.

She opened her mouth to speak, but Phineas got the words out first, "Oh. There you are, Perry."

He scooped up the monotreme and they soon heard Linda calling out, "Phineas, Ferb, Candace! Time for dinner!"

Phineas sighs and heads in.

"I can't believe this is gonna be my second-to-last meal..", he muttered to Ferb.

Perry couldn't help but overhear and pondered on what he could've meant by "second to last". As Phineas slumped him over his shoulder, he couldn't help but notice the expiration date on the back of Phineas' head and drop his jaw in shock.

'"Decay away as anything would." "Decay away as anything would." "Decay away..."', Perry's thoughts echoed. 'Phineas is dieing? The-the inator hit-! But-! He-! Ah-! Wh-?'

The kids packed up their working material and headed in for dinner. No one could find a way to put it to the parents about Phineas and dinner, for once in a long time, was very very quiet.

It was soon time to head for bed. Phineas' heart weighed heavy as he climbed into his bed and they turned off the lights. Tried as he might, the young boy just couldn't fall asleep. How could anyone sleep when they realize they're going to die? What if he fell asleep and then just died right there? What if he had nightmares OF dieing? What did he want to do tomorrow? He tried to cheer himself up with that thought as he normally did but with his inventions built and the lingering thought of his death still over his head, it was hard to really think of anything. There was still so much in his life he'll never get to do. So much he hasn't done, yet. He's built, yes. But he hasn't really said what he's been wanting to say. He had his share of secrets. He hasn't really ever done what he always really wanted to do. But as he faced the bitter cold truth, it didn't look like he'd ever get to do those things.