She'd spent that fine July day swimming in Redfish Lake near Stanley where she and her husband, Dana Schroeder, celebrate their anniversary each year.
The diamond sparkled on Alair Schroeder's finger every day since her wedding day 38 years ago.
But that night, back at the cabin, she realized her ring was gone.
"It's amazing how much a thing can mean to you," she said last week in her Ucon home.
A midnight search crew zig-zagged the beach and shallows with headlamps without luck.
The Schroeders left two days later but returned with friends, scuba gear and an underwater metal detector.
Hearts jumped every time the detector picked up traces of metal.
Optimism fell when each hit on the detector turned out to be a fishing hook, a broken necklace or coins adding up to 17 cents.
Before returning home empty-handed, Alair Schroeder looked at the lake and night sky from her balcony, disheartened.
"I love Stanley. It's my place of renewal," she said. "I looked out on the balcony and thought, 'This isn't my special place anymore.' "
In August, Amy Harris of Nampa was wading in Redfish Lake when she saw a metallic glint at the bottom.
She reached into the cool water after what she guessed was a bolt or bracket to give to her sons.
She fished out a diamond wedding ring instead.
"I was sick to my stomach," Harris said. I thought, 'Someone is so sad right now.' "
After returning home, Harris posted an ad on Craigslist looking for the owner, but it went unanswered.
Several months later with no way to find the owner, Harris decided to sell the ring.
Her husband, Jody Harris, called an old jeweler friend to quote the ring's value.
As chance would have it, that jeweler was Richard Black of Ingram's Fine Jewelers in Idaho Falls who had sold the Schroeders a replacement diamond ring and had heard the story of the lost original.
"Did you find it at the dog beach on Redfish Lake?" Black asked Jody Harris in a text message.
"Yes," Jody Harris responded. "How did you know that?"
Diamond rings sparkled on each of Alair Schroeder's ring fingers last week.
A smile adorned her face.
"People tell me there were so many happy coincidences that had to happen," she said. "I don't think it was coincidence. I think it was a miracle."
The Schroeders offered Amy and Jody a reward when the ring was returned in November.
Amy Harris hoped her reward is karma that could help her wedding ring find its way home if it's ever lost.
"Really, it was a simple thing. I just found the ring," Amy Harris said. "It's a very humbling feeling knowing the world is so small you can be part of something that can make somebody so happy."
Information from: Post Register,