Evening settled over the penthouse. Quiet. Almost normal.

Liam sat at the dining table, books and papers spread everywhere. A half--built model sat in the center. He stared at it, frustrated.

"This is stupid." He pushed papers away. "I can't figure it out."

Robert walked past. Stopped. "What is it?"

"Science project. Due next week. Worth half my grade." Liam's voice came flat. "I have no idea what I'm doing."

"What's ...