Answer to the Puzzle

"We only have ten minutes, so we have to find the answer as quickly as possible."

Hazel wiped the sweat off her face. She was so nervous that she almost trembled. The things on Elva's phone were really too important to her!

She needed to make a copy of everything without being noticed. Elva still had sixty percent of the battery on her phone. After it was done, she would need to charge her phone.

This kind of mobile phone didn't consume much electricity. It consumed almost no battery when the screen was off. Therefore, after Elva woke up, her phone must be the same as before. Only then could she truly believe that one had ever touched the phone.

"Hazel, you took every detail into consideration!"

Lucy was dumbfounded. She admired Hazel from the bottom of her heart. Hazel was born to be a detective. Even a hundred Elva wouldn't win against her.

"Well. She taught me all of this."