Collector Unit 731 #2 (of 4)

Prisoners of war James and John are realizing there's more going on at this camp than their captors are letting on. With prisoners' bodies getting sicker and weaker, escaping is a race against the clock. Meanwhile, Dr. Sadao Shuzen isn't seeing the results he would like, and he's facing a ticking clock of his own. Will anyone get out of Unit 731 alive?