Starting over after tpk

Hiya!

How can I reintroduce players to main quests after a tpk? They did most of 1st chapter with half of the second one, so I'm introducing new, custom, quests.

They are 5th level, so I'm thinking if I should push them to Sunblight somehow, or let them visit towns they are interested in and there e.g. Duvessa should tell them how harsh is the situation they are in?

They did not encounter avarice yet, so maybe she can tell them something and introduce herself, while being on her way to Caer?