Go to the Bilibin Blockade in the south-east after you leave Bilibin. You can't seem to get in, so use the usual solution : Psyenergy. Use and move the wooden box farthest to the left downwards. There will be an opening and move on!
Now, go either north-west to Kolima Forest or north-east to Kolima. It doesn't really matter, but you should go to Kolima first to get the Djinni there.
When entering either one of the two places, there will be a scene. Then, Tret will send sparkling stuff upon Isaac and co and they will be knocked unconscious. Luckily, Psyenergy shields prevent the sparkling dust from turning Isaac and co into trees. here will be one more dust/shield scene, Tret and Laurel will talk some, then you are free to move.
You will see a Djinni in a fence next to one of the houses. The way to get in is to enter the tree/house from behind. You will enter a cave and the Djinni is up ahead.
Now, go out of Kolima and go northwest heading for Kolima Forest. Before you enter it, go west onto the peninsula and push at the end at A. Normally you get the select-menu, but now you'll get the Turtle Boots! They boost your defense, but it halfs your agility. Now enter the forest.
If you haven't entered Kolima before, you'll get the scene of the sparkling stuff again. After a lot of talk, head northeast and pass the small bridge. Move a log down and walk your way to the west into the next screen.
Go to the west, to the 2nd log. Move it to the north and walk your way to the north and then to the east and follow your way out of the screen. Don't forget to grab the Nut with (Catch)! You get a little log puzzle (pictures to be added soon).
First, move the most right log to the west and follow your way to north-west-south and push the horizontal log to the south as well. Now move the vertical log to the east again. Move the most southern log to the south and move the most north log to the north again. The path should now be clear. Move the vertical log into the water and follow your way.
You'll now get into an area with tidals and logs. First go the right and move the switch so you can move the logs. If you wish you to get one fast straight way, move the most norhtern vertical log to the left and that's all - after you've did that, move the switch to high water so you can jump ON the logs and head to Tret. Otherwise you have it like the picture left in order to get the Fur Boots.
Exit at the north and you will encounter Laurel and Tret. Talk to Laurel and she will tell the complete story about what happened. If you talk to Tret you will notice that an Evil Tret took over Tret... Now climb up the vines and enter the Tret Tree...