Puzzle 1: Message in a Bottle

Chief: "Hello Agent - I'm glad you're there - we need your help. We have an active investigation underway and we need you to make contact with a potential intelligence asset. We don't have a name - all we have is an address and the clue "message in a bottle". We don't know what it means. It could be a trap, but we’d still like make contact, if we can. The information this contact can provide could be explosive. Will you accept this mission, Agent?"