K.C. is caught in the middle of a CIA assassination plot when a CIA hit man, named Ace, asks for her help to kill a suspected Viet Cong officer, but she gets arrested after being accused of the murder. However, it's K.C.'s friendship with McMurphy that goes on trial when McMurphy is asked to vouch for K.C.'s innocence. Meanwhile, Boonie befriends a resourceful Vietnamese teen who is reluctant to be drafted into the ARVN.