Not forgotten

the long version

"Driven by his passion to help the people of North Korea, Bae moves to neighboring China to lead guided tours into the secretive nation. Six years later, after eighteen successful excursions in and out of the country, Ken is suddenly stopped at the border: he inadvertently brought his hard drive, that reveals the true nature of his visits, to customs. He is arrested, brought to Pyongyang for further questioning, and sentenced to fifteen years of hard labor. His crime? Attempting to overthrow the North Korean government"--Amazon.com.