Sleeper

There are only three things that courier Mark Barrett won't deliver: drugs, guns, and people. Sleeper is the story of why he definitely won't deliver people. "Three days and three nights on a train traveling from Istanbul to Riga. Scenic. Boring. But easy."

Mark Barrett thinks he's chaperoning Elena, the wayward sister of an old friend, on a three-night sleeper train journey. He thinks he's getting her home so she can rejoin the family business.

But Elena has other plans. She's in possession of the key to ten million euros worth of Bitcoin. It isn't hers, and the owner, the leader of an Albanian criminal clan, wants it back.