Finally, the line moved forward. Amy pulled the Wowzabelles trunk, and Dan grabbed the tuba.

“On your way to a concert?” The policeman smiled.

Vanessa nodded. “We’re on a European tour,” she added proudly.

“And what is a Wowzabelle?” he asked.

“Awesome singers,” Amy said, handing over her passport.

Dan waited while the policeman scrutinized the photo, comparing it to Amy. Then he reached for Dan’s.

It seemed to take long seconds before he handed back the document. He ticketed the trunk. “This will go in the oversize compartment – pick it up in Zurich. Welcome aboard.”

Only Dan heard Amy’s long sigh of relief as they boarded the train and found their seats, stowing the tuba overhead.

Dan glanced out the window. A man in a raincoat was talking to the friendly policeman. He had a nose like the beak of a raptor, and his dark hair looked as though he’d blow-dried it with an airplane propeller.

Dan looked away, checking out the station, but his gaze snapped back. He didn’t know why, exactly. Maybe because the man wasn’t showing the officer a ticket or a passport, he was just leaning in, talking to him. And all the while his gaze swept the station.

Detective, Dan thought, as the policeman pointed to the Lucerne train.

The man scanned the windows as he walked alongside the train. Dan shrank back.

He nudged Amy and tilted his head.

“Can I use your phone, Carrie?” Vanessa asked Amy. “I really need to call Ms. Mutchnik.”

Vanessa leaned forward for the phone, and Amy crashed back against the seat. Now shielded by Vanessa, she was able to watch the man as he moved, his gaze on the windows.

The train started with a lurch. They saw his face briefly as they slid past him. He started to run as he tried to catch up and jump aboard. Had he seen them? The train accelerated, and he was left behind on the track. Dan and Amy exchanged a relieved glance. He could have been just a guy who missed his train. But somehow Dan didn’t think so.