There is a small walktrough of the current version.
1/ Exit the crypt, and go to the small tent outside nearby.
2/ Once arrived at Lubana, go to the INN, speak with the lady.
3/ Go to the townhall.
4/ Go back at the INN. Go upstars then to the empty bedroom.
5/ Leave Lubana, and go to the Merchants Guild (Manor at the south of the lake).
6/ After the cinematic with the staff, go to the left upstairs and enter the first bedroom.
7/ Return to the staff member, then go to the door behind him.
8/ Downstairs go in the corridor and upstairs to reach the meeting chamber.
9/ Go outside, then to the forest. North-East from the guild.
10/ As Vik and Alexander said, one map to the north and one to the east.
11/ Enter the lake, take the Fire Stone and defeat the boss.
Congrats! You went through the full story!
And don't worry, the quest log will be in the next version of the game! (just bought Yanfly's RPGM plugins)