From MANHUNTHem's words came at Henry like bullets. "Maybe you haven't noticed, but our parents haven't come back. If they've taken the Mona Lisa . . . and then left us this," -- he held up the notebook -- "it's because something has gone desperately wrong, and we're the only ones who can get her to safety now."Henry didn't know what to say. He looked at Anna and Jose. Anna's face looked white as her notebook paper, and Jose's lower lip was trembling. Henry turned to Hem. "You really think that's what happened?"Hem nodded. He didn't look full of himself any more. He looked scared. Henry took a shaky breath and tapped Anna's notebook. "Then let's try to figure this out." He tried to sound brave, confident. Maybe he couldn't do anything about the situation at the hospital back home. But he could do this. He could try -- even though he had no idea where they were going, or who might be waiting when they got there.