This is set in season 1 where Piper and Prue don't know about elders or whiterlighters. Phoebe found out Leo is a whitelighter but hasn't told her sisters
Piper's Clock
Chapter 1
Piper came in from another terrible date.
"That was probably the worst yet!" Piper said.
"What's wrong?" Prue asked.
"I don't know just every guy I'm with is a warlock or a ghost or has to go away.." Piper said moaning.
"You mean Leo?" Prue asked.
"Yeah, Leo was really great until he had to leave."
"Piper what's that sound?" Prue said there was ticking sound coming from Piper.
"It's you!" Prue said.
Prue looked though the book of shadows. While Piper and Phoebe sat in the room.
"How can I be ticking? It makes no sense." Piper said.
"Don't worry we'll find out what's wrong." Phoebe said.
"It says here to consult your other realm doctor for magic-medical problems." Prue read.
"What's an other realm doctor?" Piper asked.
"I don't know?" Prue said. Phoebe started looking it up the phone book.
"Here it is." Phoebe said looking at the address of the other realm hospital San Francisco
Standing outside the hospital.
"It looks like any other hospital." Piper said. They went in.
"Can I help you?" The girl at reception asked. Seeing that they looked unsure. "Don't worry your secret's safe. This place is protected by charms only magical creatures can get in." She said.
"My sister is making a wierd ticking noise." Phoebe said.
"Okay the doctor will see her soon." The girl said.
"How do we know we can trust you's , that you're not demons or something." Prue asked.
"We not demons this place was set up by the Elders." The girl said looking at little offended.
"Elders?" Prue said looking confused so was piper.
"Elder whitelighters? Didn't your Whitelighter tell you about this place?" The girl asked.
"Piper Halliwell?" A doctor called and Piper went in.
"What's a Whitelighter?" Prue asked still confused while Phoebe tried to hide the fact that she knew what a whitelighter is and who their is.
Piper came out.
"What did they say?" Phoebe asked.
"Its fine they took out my biological clock to give me more time.
"They actually took it out?" Phoebe asked.
"Since when did you want a baby?" Prue asked.
"I didn't that's why they're setting it back. I guess it's just all my friends from school are married and have kids..."
"Oh it's okay honey." Prue said and both her and Phoebe hugged Piper.
"Oh they said I might have mood swings with it out." Piper said.
Phoebe walked into Quake with a white paper bag that had Piper's biological clock in it. Sha had to go pick it up for her.
"Hey is Piper here?" Phoebe asked the girl at the counter, putting down the bag.
"No she went home, she seemed tired." The girl said Phoebe made some coffee as a customer left down another white bag beside Piper's.
"Okay I'll go see her at home." Phoebe said as she picked up the bag the other one was gone. Phoebe was out the door went she opened the bag to find a book
""The Valley of the Dolls"? Where's Piper's Clock?" Phoebe said as eye looked terrified knowing Piper was going to kill her. She ran back in.
"Has anyone seen a clock?" She said panicked looking around for anyone with a white bag.
Prue sat in the sitting room bandaging Kit's ear as Phoebe burst in the door.
"Thank god your back did you get Piper's clock?" Prue said looking up.
"What happened to Kit?" Phoebe said noticing Kit's ear.
"Piper bit her ear." Prue said.
"What?"
"No it was all Kit's fault she meowed nicely to Piper when she came in. Piper gone nuts without that clock." Prue said as Piper came in.
"Oh is that my clock? My clock's home! Let's have a clock party." Piper said jumping around the place. She opened the bag and pulled out a book.
""The Valley of the dolls"? Where's my clock?" Piper asked.
"Someone took it." Phoebe said.
"What!" both Prue and Piper said.
"It says here if a witch loses her biological clock she has 48 hours to get pregnant or she can never have children." Prue said reading from the book of shadows.
"Don't worry Piper we'll find your clock." Phoebe said.
"Forget it! I have to find a man!" Piper said leaving the room.
"I'll go check Quake, see if Andy can help." Prue said leaving.
Phoebe picked up Kit.
"Leo! LEO!" She called. " You probably can't even hear me..." She said quietly when Leo orbed in.
"What?" He asked.
"How did you hear me?" Phoebe asked.
"I'm still your whitelighter I can hear when you call me." He said.
"Okay just do your thing you do." She said holding out Kit. Leo put his hand over the cat's ear and healed it.
"How come you didn't tell us about the hospital for witches?" Phoebe asked.
"I didn't think you needed it and I wasn't menthe to get exposed to you. Why what happened?" Leo said looking worry at why they would needed it.
"Piper had to go she got her biological clock remove and I sorta lost it." Phoebe said as Leo looked shocked that Piper had her clock remove and more that it was lost.
Prue had police tape all round where phoebe last had Piper's clock in quake. Andy came in.
"My sister's clock was stolen; you need to find it quickly." Prue said
"You called me out of a homicide case for your sister's clock?" Andy said surprised but used to unusual things with the Halliwell sisters.
"No, it's really important we find it." Prue said.
"Prue, what's going on?" Andy asked.
"Nothing just Piper's clock. She's really attached to it." Prue said as Andy didn't believe her.