This movie, unlike the other one, is a direct continuation of the 1984 original movie and the 1989 sequel and has a ton of easter eggs that tie into things from both of those movies. The basic storyline is that Egon packed up all of the Ghostbusters equipment and moved from NY to Summerville Oklahoma. This caused a rift with the other Ghostbusters that was really never repaired. We find out that Egon did have a family, including his daughter Callie (played by Carrie Coon) and grandchildren Phoebe (played by McKenna Grace) and Trevor (played by Finn Wolfhard). Upon Egon's death, the family moves to his farm in Summerville and the rest of the story plays out from there. I will not spoil anything about the rest of the plot, but it is directly tied to the original movie and there are many parallels to that story. Where the original movie was more of a straight comedy with some action, this one is more of a dramedy with a lot of action spaced throughout.
For those who get the 4k set, the movie looks and sounds wonderful in the UHD format. The movie has a ton of great special effects that are a mix of CGI and practical that looks seamless even in UHD, and there is a lot of great cinematography. The UHD disc has the movie and about 15 minutes worth of preview trailers that play before the movie. Then, there is a regular Blu-Ray disc that has the movie and the rest of the extras on it. These include several making-of and behind-the-scenes featurettes, a discussion of the impact of the original movie by Ivan Reitman, Ernie Hudson, Dan Aykroyd, and Bill Murray, a featurette on the various easter eggs in the movie to tie back to the original films, and a single deleted scene.
Overall, the movie is very, very good, and a perfect sequel to the original movies. It was written and directed by Jason Reitman, who is the son of the director of the original movie, and he made a wise choice to bring back as many of the creators of the original movie as he could. The movie does include all of the living cast members from the original movies (aside from Rick Moranis who had retired from acting) in either cameo or extended cameo roles. And, the movie was able to include Harold Ramis, who of course passed away in 2014, in a couple of different ways, one of which worked well and the other which was a bit corny but did have some emotional punch. The bulk of the story involved the new characters. McKenna Grace (who is best known for her roles in the movie Gifted and the series Designated Survivor and Young Sheldon) was really the star of the movie, but all of the cast members, both main and supporting, did a great job. Paul Rudd was awesome as a teacher at the elementary school in Summerville who was not really interested in teaching, Logan Kim was equally awesome as Podcast, and Celeste O'Connor did a very good job as Lucky Domingo). The rest of the supporting cast included Oliva Wilde, Josh Gad, Bokeem Woodbine, and J.K. Simmons in a small role. Not only does the movie provide a lot of nostalgia for those of us who were kids when the original movie came out, but it tells a good story of its own. There are mid and post-credits scenes, one that plays for comedic effect and the other that sets up the possibility of further movies. If you are a fan of the original movie this is a must-watch.