Being heir-apparent to Dracula sounds fun. You can absorb souls and inherit their powers, you get a big castle, and immensely hot women with no relationship sense will gather round to comfort you and prevent you slipping completely into evil. Even if you did, they'd probably still gather round. Why, then, is Soma Cruz, Dracula's actual heir, so very depressed about it?
Well, for one thing, people keep trying to kill him. In fact, that's the main thing. Last time it was the goodies, who didn't really trust him not to go all the way bad, and now, in Dawn of Sorrow - set at the point in the Castlevania timeline when Dracula's castle is set to reassume some of its former power - it's a bunch of cultists who, while they actually believe in God, equally believe that for him/it/she/Yahweh/etc. to exist there must be an opposing being of absolute evil. Namely Dracula. Since they have some candidates to replace Soma and be the dark lord, they're keen to do away with him.
All of which draws us back, AGAIN, to Dracula's castle, where nasty things are unfolding thanks to the cultists and, well, the fact that it's Dracula's castle. Not that we're complaining - Dawn of Sorrow is one of the best Castlevania games we can remember, and although its concessions to the DS's unique feature-set are of varying quality and import, it's still a game that you definitely need to own if you have more than a passing interest in action-adventure. Although, you might want to clarify whether it's action-adventure you like, first, because Castlevania's biggest trick was and is its unique transcendence of gaming instincts.