The sequel. Begins with Phoenix getting hit in the head and having amnesia forcing him to relearn everything how it works against the starter prosecutor. Interesting enough it has a very peculiar cutscene in a dream sequence when Phoenix stands on a cliff and the judge strike him down while that horror music from Bach is playing. The rest is protecting this innocent police aspirant from the murder charge against her boyfriend. The real criminal was some paranoid scammer... which doesn't tie in to the rest of the game and is actually set between case 2 and 3. Mostly it's probably to keep Maya out of the way for reveal in the end. Which is nice since it's so fun to see them together again.
Case 2 is their meeting each other again when a client of Phoenix requested a spiritual seance with Maya to get a dead nurse to admit to being responsible for 14 deaths at his hospital. Also have a nice cutscene with a car speeding though on the highway and crashing and exploding in flames with one survivor. This chapter is more learning about the Kurain spiritual technique that Maya uses to summon Mia. And introduce Pearl, Maya's cousin and probably the stronger medium since she actually is from the main branch of the family, but due to her mother's lack of spiritual power it was passed to Mia and Maya's mother who's been missing since the DL-6 incident from the first game. It sets up Morgan Fey as an arch-villain for this and the next game. It also gives us the psych-locks which is a mini cross-examination to learn secrets from people to get evidence or such to help in the trail. New prosecutor for the series is Franziska von Karma that whips everyone.
So don't play with mine, I'll put you to shame
It's an eye for an eye, you're in a blind rage
And I'm standing my ground, no I'm not afraid
Case 3... pretty much seen as the worst case of the original trilogy. You have to defend a stage magician from a murder in the circus. Where you have an unfunny clown, an obnoxious ventriloquist and one episode in the trial where you can't press the witness (the clown) since he does a joke and you get penalised for it. Also, is it just me or is everyone fawning over the animal tamer a bit... gross? I mean, first off, she's 16 and the suitors range from 21 to 30... and to top it off, she appears a bit... mentally challenged? I didn't have that much trouble the first time playing and it's one of the more sadder episodes when it comes to why the murder happened.
Then comes case 4, I would argue the best case so far. First off, it's the most callbacks to the first game, you're at the hotel where April May was observing the murder of Mia Fey. Powell, Oldbag and Lotta shows up and Edgeworth reappears with the greatest theme music in the series (for real this time). They use it like 4 times and every time it just pumps the mood. You have an assassin that kidnaps Maya to force Phoenix to defend the superstar actor so you have stakes in this. Franziska gets shot, Gumshoe gets fired and crashes his car racing to the courthouse with crucial evidence and Edgeworth returns to the prosector stand after spending a year away... I assume looking into the assassin's overall activities. This case, not a single bad thing about it. This is the high point of the game and I think my original statement included the whole trilogy.
Sadly no extra 5th case in this version. But you got to search for electronic bugs in the final chapter which together with the blood and fingerprint in the last chapter from the first game would work for a detective series. I don't recall investigations worked like that, but that would have been fun. They introduced the ability to show people as well making it a more intuitive way to ask people about different people. Still the same thing with evidence that they aren't able to investigate them. Overall, the final case makes it wonderful, the second case you need to get the payoff in the next game, same thing with the first case since it affects another case in the third game. If you could I would maybe skip the 3rd case, but it has a point for a chapter in the newer games (I think it may have been one of the extra cases and not a main one, but it was so long ago I can't remember, probably with the murdering whale).