Well yeah, I'm about 8 feet tall!
Oh, those guys are part of the Dark Brotherhood! That's their Cheydinhal Sanctuary in that abandoned house. Don't worry though, they only kill people they're paid to kill. Or people that piss them off. Either way, you're fine since this is your first time in Cyrodill.
*casts Uber Restoration Spell*
Because I don't have any ;~;