Davos is coughing up blood. That's probably not good. He ought to see a Maester about that. Instead he tries to visit Stannis but has to visit Salladhor Saan first. He tells Salladhor he plans to kill Melisandre. Salladhor says he should get well first but Davos isn't having any of it and goes to see Stannis anyway.
Stannis apparently doesn't see people any more. Instead Davos gets arrested by Melisandre's men. She seems to know all about Davos's plan. Did she hear it from Salladhor already? Or does she have her own version of Varys?
Now it seems as if Melisandre is basically Wormtounge to Stannis's Theoden. Where is Gandalf?