O.N.E. P.I.E.C.E.
"FRANKY, CUT IT OUT!"
Even when falling to his apparent death over a cliff, Franky in Chopper's monster body, hot on his heels, Luffy was having fun. Those yetis were so cool! He wanted to bring one home with him, but they'd hurt his friends, so Luffy reluctantly decided he had to kick their butts instead.
"Luffy! You can't hit them with normal tactics!" Nami warned from her position tied up in iron chains several hundred feet above his head, "They're monsters; they were sent by a goddess to collect all the demigods!"
"Oh?" Rock hummed, amused, "You know about that, cyborg man? That's pretty cool of you."
"It won't help your mortal friends though," said Scotch, firing another volley at Luffy, "Lady Khione has no interest in you, so we're collecting our due pay from the master for your head."
Second Gear!
The yetis were fast, but Luffy was faster. With his observation haki, it was only a matter of dodging until he found the perfect opening.
Jet Pistol!
"Not cool!"
"Nice one, Luffy!" Nami cheered as the yetis exploded into monster dust, "Now get me down from here!"
"Why aren't the others with you?" Luffy asked seriously.
"I'm not a demigod in Franky's body," said Nami, "So the yetis overlooked me. Meanwhile, they've got Annabeth, Leo and probably Percy and Sanji too tied up somewhere waiting for Khione."
"Who's that?" asked Luffy, "She sounds pretty."
"She's not," Nami assured her captain, "I've heard the stories. Leo and some of our other friends kicked her butt twice leading up to the Giants War. The Goddess of Snow is an absolute nightmare; we have to save the others before she gets her revenge."
And with that, the two ran off towards the laboratory at top speed, Franky chasing behind them the whole way.
O.N.E. P.I.E.C.E.
When Luffy, Nami and Franky got back to the laboratory, they found Law waiting for them with Usopp, Robin and Chopper.
"It looks like you didn't need my help after all," said Law, "Good job with the yetis."
"Hi, buddy!" Luffy said cheerfully, "What are you doing here?"
"You remember that offer I made you two years ago, Strawhat?" asked Law, "Well now I'm ready to remake it."
"What offer, Luffy?" Nami asked the captain.
"Two years ago, when we were on Sabaody, Traffy came to me and Zoro with an offer," said Luffy, using his serious voice, "Traffy, you wanna tell my crew what it is?"
"I have a plan to take down one of the Yonko," Law announced, "And I'm asking your help to do it."
Silence.
Then-
"ARE YOU INSANE?" Usopp shrieked, grabbing Luffy by his coat and shaking him, "This guy freaks me out too much, Luffy, how am I supposed to sleep with him nearby?"
"It does seem a little farfetched," said Nami, "We don't even know that much about him."
"I told you two years ago that my crew had to approve of you first," said Luffy, causing the Strawhats to breathe a sigh of relief, but-, "But you saved my life at Marineford. I trust you, so the others are just going to have to trust you too."
"Luffy," Nami sobbed, "Why would you get my hopes up like that?"
"Mr. Law, sir?" Chopper asked timidly, "Do you think you could change us back, please?"
Law rolled his eyes.
Room! Shambles!
"OW!" Franky struck a pose, "I'm back baby!"
Franky took Robin in his arms and spun her in a circle, "Glad I can do this again."
"I never doubted you for a second," Robin said fondly.
"Franky," Chopper groaned, "Why'd you go and do that to my body?"
Franky grinned sheepishly, "Sorry, Chopper-bro; I guess your powers were too much for me after all."
"WHY AM I SANJI NOW?" Nami wailed.
"The fourth Strawhat isn't here," said Law, "Your soul found its way into the nearest vessel; it's as simple as that."
"There, there," Robin patted her on the shoulder, "I'm sure the others will be back soon."
"I wouldn't count on that," Law said seriously, "First of all, I need to know that I can trust you with my biggest secret."
"You're a demigod," said Nami, "A Son of Athena."
Law looked taken aback, "Oh, you've met my sister, then?"
"Her name's Annabeth," said Nami, "And you two do have the same eyes, so I can imagine how you'd guess that she's also a child of Athena."
"You must be the Cat Burglar Nami," Law reasoned, "I saw what you did in that auction house two years ago. My research said that's a power of Aphrodite?"
"Yes," said Nami, "And when did you discover all this?"
"The world of Gods?" said Law, "Fairly recently. It does explain all the weird things that happen around me. At first I thought it was just the Grand Line, but meeting your second doctor confirmed for me that my experiences weren't normal."
"We have to save him," said Nami, "Him and the others. Sanji has no idea what he's gotten himself into. We have to save the kids too."
"Naturally," said Law, "And even though I don't agree with saving the kids, I know you want to help them. I have a plan to save everyone and start our defeat of Kaido. It involves kidnapping Caesar."
"Why would the master take these children?" Robin mused.
"Yeah!" said Usopp, "How could anyone experiment on little kids like that?"
"Well, the World Government does," said Law.
"The Government?" said Robin, intrigued, "Why?"
"If I had to take a guess, I'd say they're in the race to create giant soldiers," said Law, "Caesar just wants to do it first."
Law turned to look at the others, "Are you sure you want to save them? You don't even know these kids?"
"That's true," said Nami, "But when they looked at me with tears in their eyes and told me they wanted to go home, I just couldn't refuse."
Law sighed, "Alright, then here's what we'll do…"