On the Imperial-occupied world of Balmorra, your mission is to recruit a demolitions expert named Tanno Vik into Havoc Squad. Vik is currently working as a mercenary for the Balmorran resistance movement and is supposedly conducting a top secret operation that seems to always keep him one step ahead of you.
Just as you were about to finally meet Vik in person, he was captured by Imperial forces and taken to a high-security prison in the Balmorran Arms Factory, the Empire's most heavily defended base on Balmorra. Head to the prison and get Vik out of there.