An Amazing Retrieval

This morning--before the sun rose--we arrived at Haneda airport, Japan.  Six passengers/10 pieces of luggage.  We weren't quite sure where we were going--a general direction of Saitama (countryside) to visit my sister-in-law.  However, we weren't clear on how to get there.  So we lolligagged as long as possible, eating breakfast, drinking tea in the aiport restaurant.  Then we headed for the monorail, which took us to a train, then five sets of stairs (fortunately all down), then a subway, more stairs, another train.  Four hours later we were at my sister-in-law's station.   She took us home, and my brother-in-law cracked a carton of juice for us.  My daughter took one sip and raced outside. 
"What's the matter?"  I called.
My brother-in-law looked up, concerned.
"Are you alright?" I called again.
"My retainer," she said, tears forming.  "I don't have my retainer."
She had left her retainer in a napkin on the table in the restaurant at the airport. 
Oh, gosh.  We'd never find that.  Never.
My older daughter said,  "I think you better translate this debacle, cause he thinks she just doesn't like the juice."

I had to laugh.  And gladly told my brother-in-law the problem.  He said,  "Don't worry,"  picked up the phone and called the airport.  He described the restaurant and the retainer.  They had it.  We all did a little dance while he stayed on the phone.  Apparently, in order to release the retainer, they needed a note complete with address and signature and instructions.  After getting my younger daughter's signature, he raced out the door, insisting it wasn't far.  He was back three hours later with the retainer.  I'm still amazed. And so grateful.