i'm in mission 4, how do i sneak the theif into the storehouse ? thanks

simple, you need 2 thiefs if its that map what i think, 1 thief you let killed and with other you sneak to storehouse or where you need to go.Then you need to destroy and help out 1 knight, for that you need winter, cross the ice and you are in city, you need to detroy the walls before Xd