If it's like indigo prophecy you'll be given little segments of maps to walk around in and interact with the environment. Think RPG maps, you're outside of a police precinct, you can hang out on the side of the building, try looking in the alley, or just go in to go to work (jayden). In the entrance there's a secretary, people talking to her, and other things. You can either go straight to your office on the 2nd floor, or you can look around and see if you can interact with things, maybe go out the side and enter the athletics area where they have weights, and such. You go to your office, but on the way this punk that has been asking for results on some case you're doing just blocks you and demand that you clean your act up. He mentions you're late and you're buzzing out all of a sudden. Your blood pressure is going up, then you get options on what you should do, but since you're not calm, and haven't taking any pills you can barely make out what they are. Wait too long and you just might do something stupid like punch your boss. You pick "I'm on it" and everything is going fine now, but you're still uneasy for not taking the pills. You then walk around the area with the cubicles and such before going into your office. You notice a door that's not your office is unlocked, etc etc.
What I described is all pretty much from Indigo Prophecy but some tweaks. I don't see this game pulling a FFXIII and taking a chunk of that away from it. It was shown in the opening that you can walk around and do whatever anyway. It was also shown in the Taxidermist demo that you can walk around wherever too.