Video Description:

The War Within arrives in December. Are You Prepared?
The War Within will have you embark on a chilling journey, where both your Warframe and Operator will be pushed past their limits as you slowly unravel mysteries about the Tenno’s past and their true capabilities. To begin this journey, you must have completed The Second Dream Quest and have access to the planet Sedna by unlocking the Pluto-Sedna Junction.