Which, unfortunately, is just about all this game is going to last you. It's fun while you're playing it, and there are a number of surprises for people who've never touched the older games in the series, but for the most part
Castlevania: Chronicles is an old-school
Castlevania game, with many of the problems that that entails.
There's a plot, I'm sure, but it was never really coherent in these games. You have to go whip Dracula's butt as usual, and the game starts with you going to his evil castle in Transylvania. Or something. As the game progresses, you'll dive under the castle, over the castle, and all of the sorts of places you expect in the series. Unlike Symphony of the Night or Circle of the Moon, the game is linear, and you'll basically be marching through the stages one-by-one on your way to fight Dracula.
More can be said, but there's really not that much to the formula. Like the older games, you have considerably less control over your whip and your jumps, which may be realistic, but it's a pain in a platformer. The levels range from trivial to damned difficult, and there are a lot of cheap hits in the game that you can only get past with rote memorization. Ah, well. You can unlock some stuff by beating the game, and it's worth playing through--it's a fun game--but the staying power is a little more dubious.
Fortunately, the game's being offered at a low-enough price point to make it worth a romp.