The only person who knew about Yvonne's plan that night was Otto.

This entire thing was such a heavy burden on his shoulders that he couldn't fall asleep at all.

The lights in his study were still on. He sat at his desk in front of his computer, repeatedly going through the video of the truck's journey.

He picked up his mug and tried to take a sip when he realized that there was no longer coffee in it.

He furrowed his brows. He was inexplicably annoyed. He needed to vent his emotions, yet he couldn't pinpoint where all his emotions were coming from.

He rubbed his temple hard, trying to calm his anxious heart.

After calming down a little, he looked at the time. It was already 1:30 am, yet he wasn't sleepy at all.

He got up and made himself another mug of coffee before returning to his desk. He blew on his mug and took a few small sips.

He hadn't added sugar or milk to his coffee. The bitterness and aroma of the coffee slowly spread on his tongue.

He drank half a mug, his gaze