Note: If you want an enchantment free version: You can grab it here.

Short Version
In Riverwood, a Lockbox is washed down the river. It contains a Mother's last gift for their child.

Slightly Longer Version
This mod adds a lockbox across the river from the woodpile/mill. Inside is a letter and "A Mother's Pendant" enchanted with Muffling. As for what happened to the mother and child? Who knows.

Quick "How To Find" Guide

• Fast Travel To Riverwood
• Enter the Town until you get to the first fork in the road
• Turn Left, follow till you get to the river.
• Look on the other side of the river, near the edge until you find the lockbox.