The Substitute Sister's Secret

Summary

Three years ago, my sister-in-law ran off with another man right after giving birth.

My brother went crazy looking for her for a long time, but eventually, he disappeared without a trace too.

Recently, my niece fell into a dry well while playing.

I quickly called an excavator for rescue, but my mom stopped me:

"Don't dig! Something bad will happen!"

Everyone thought my mom was just being superstitious.

But unexpectedly, while rescuing my niece, they dug up a skeleton.