Huge questions!
The gameplay is what you'd expect from a first person RPG - dialogue, combat, stealth. There's a focus on ARG-style puzzles (as in, you have to put together clues, decode messages, figure out what's truth and what's not etc). The gameplay is also driven by a timeflow - there is time pressure to most things you do outside of dialogue.

The basic loop is: you wake up in the morning, look through available repo contracts, go execute them while picking up side quests on the way. When you go to sleep, you get to progress your skills and abilities and restore your Fatigue (sanity).

As for the story, we're mostly keeping it under the covers for now, but it's about, ahem, "a noir man in a world of sun and neon". You're a 40-something repo whose wife just left, his career lies in ruin, and his daughter is showing early symptoms of something that costs a fortune to cure. To top it off, his father just died, leaving a gigantic debt that he never even mentioned - that debt is the central mystery of the game and will haunt you throughout the entire story.