The Question and Answer section for Antigone is a great resource to ask questions, find answers, and discuss the novel.
Creon is looking to mitigate Antigone's motivations for standing firm to bury her brother. The theme revolves around Antigone's pride of duty in the face of a King's edict.
Sorry, I can't summaise the whole play on this short forum space but you can always check out the GradeSaver summary at the GradeSaver link below.
The central issue is Antigone honouring her disgraced brother by burying him against the wishes of King Creon. The audience learns that there are certain convictions worth standing up for and dying for.