What is the main conflict in The Girl Who Kicked the Hornet's Nest by Stieg Larsson?

Larsson's The Girl Who Kicked The Hornet's Nest is the third book in a trilogy. As such, the story picks up the day after the ending of The Girl Who Played With Fire. The book openly celebrates strong women, often referred to as warriors.

The story picks up just after Salander has defended herself against Alexander Zalachenko, her father. Zalachenko had shot Salander in the head numerous times. Miraculously, Salander was able to return the attack with an axe. Zalachenko was struck in the head and several other places although none of the wounds was fatal.