Dr. McCoy is accused of causing a plague years earlier on the planet Dramia.
Dr. McCoy is accused of causing a plague on the planet Dramia years earlier, and he is arrested when the Enterprise visits to deliver medical aid. Kirk must prove his friend's innocence while the people of Dramia demand justice.
The story is a drama about guilt and the past. It places McCoy at the centre, and shows the loyalty of his friends. The title refers to the burden he carries, and fans enjoy the courtroom elements and the sympathetic look at the doctor, as well as the mystery of the plague.