This game is a prequel to Blackwell Legacy. It's 1973, and we're watching Joey working with Lauren, Rosa's aunt. The basic setup is the same as in the first game -- Joey is Lauren's spirit guide, and they work together to help lost spirits accept their deaths and move on -- but Lauren and Joey have been working together for some years and are a smooth team.
Unlike normal walkthroughs, in Nice Game Hints you can select just the puzzle you want hints for. Here are listed the puzzles for "When does this game take place?" in Blackwell Unbound. The guide you choose only contains information about that puzzle, reducing possible spoilers for other puzzles.