Tao Yueyue curled up on the cold, hard concrete floor. The storage room was empty. There was a drain under the window for her to go to the toilet. After using it several times, the smell of urine filled the room.

She organized her thoughts. The police probably started investigating the little boy killed in the housing community last night. It’s unknown whether that neighbor would tell the police the message she left, but she couldn’t pin all her hopes on it.

I must leave a message for Uncle Chen, but how should I leave it? In writing?

However, if Zhou Xiao finds out, the trust I’ve finally built up would fall apart. Then, I’ll truly become a prisoner.

The message can’t be found easily, and even if it’s found, it can’t be recognized.

She had never learned Morse code. If it was another form of code,...