Davos joins Stannis's party to parley with Ser Cortnay Penrose, who currently commands Storm's End.
Stannis demands Penrose to surrender the castle to him, and he'll pardon him and his men.
When it becomes clear that Edric Storm, Robert Baratheon's illegitimate son, must also be surrendered, Penrose refuses the offer. Instead, he counters with an offer of single combat between champions.
Stannis promises no mercy should he be forced to storm the castle.
Davos and Stannis ride back to Stannis's camp. They discuss the predicament with Penrose as well as Renly's fate; Stannis admits to having nightmares where he is present at Renly's death.
Davos recommends Stannis strike for King's Landing immediately, but Stannis emphasizes that he will not have people say he was defeated at Storm's End, which is a little like saying you'll forego certain victory in the finals in order to focus on your preseason record.
He orders Davos to land a boat beneath the castle as he once did to aid Stannis during Robert's Rebellion. Davos suggests cleaner ways of accomplishing the goal, but Stannis maintains he must have Edric Storm.
That night, Davos does as he is ordered and brings Melisandre beneath the castle and behind its supposedly magically protected walls.
There, Melisandre undresses, and Davos realizes she is pregnant. She gives birth to a shadow assassin, and it slithers its way into the castle.