Kartikay surrenders to Banasur

Banasur goes to Kailash to attack the gods. Nandi and Kartikay warn him to return to Sonitpur, but he refuses. Kartikay finds it difficult to fight Banasur because of Mahadev. He defends himself but doesn't attack. Later, Kartikay surrenders to Banasur. How will Mahadev protect Kartikay from Banasur?