In the final book of this trilogy, Willi and Sabine's daughter, Liesl, is looking for a cause. It's early 1989, life is good, and the Cold War seems to be thawing ... slowly. But as Liesl works on a class project about her family, she uncovers a startling secret about her American grandfather, thanks to a boy from Wyoming. And no one expects what would ultimately happen to the wall that has separated her family for years.