Emma snuck into Rumple's shop, looking for the wand. It had to be in there somewhere. She was about to try and use magic when she heard a key in the lock. She froze, thinking for a moment, and realized there was only one thing to do. She concentrated on her magic, and... she was outside. After Rumple and Belle entered the shop, she re-entered.
"Closed", he said.
"You'll want to hear this", Emma replied.
"Oh, really?"
"Yes."
"What?"
"I can bring back your son."
A look came over his face, one of hopefulness, but it was soon gone. "Oh yeah, how?", he asked sarcastically.
"Time travel."
"Really? You saw what Zelena had to do."
"Yeah, but, to get back, all I had to do was use a wand that can recreate magic. I can do it again."
The hopeful look came back again, but disappeared. "Messing with the past is a bad idea."
"There's a way that can avoid that."
"How?"
"We go right to the moment he died, and you can do a preservation spell on him like Regina did to Henry in Neverland. Then we bring him back with us and figure out a way to save him."
"That's... actually quite brilliant."
Emma smiled. "Thank you."
He went into the back and came back with the wand. "Alright", he said. "Let's go."