In 1960s, as the first batch of geological exploration, we were secretly mobilized into a geological engineering team. Not knowing the destination, the place and the reason, we came to a virgin forest on the verge of our country. Suffering from anxiety and death threat, we watched a confidential movie which shocked us--the information beamed back by the seismic wave clearly showed that the crust of 1200 meters underground was embedded in a Japanese heavy bomber. It's a conspiracy or a supernatural force? With confusion and courage, we go into the strata, which, however, ended up with indefinable results.