Mysterious Parcel

Boss, I have a package for you. The messenger who delivered it, there was definitely something strange to him. I can swear I saw smoke rising up from his hood!
He shoved me the parcel and muttered that he'd be back next week. I just turned away, and he was gone. I have no idea what is it in this package, and where it came from!

If this messenger show up again the next week, I won't let him go away this easy. I'll ask who he is and what he's up to! Have to keep all my eyes about him, though, or he'll flee in a wink again!