I got the Key of Serenity and opened the Door, now i stand in front of a door inside the house that won`t open. I see the chest with the helm in it, but i can`t open the door. I found a message in this forum that said "watch for something on the floor" but cant`t find anything on the floor. Can anyone help me please. Thanks a lot guys!

i'll spoil it for you, m8;
get out of the building, turn left, climb up the robe, turn left, then left again; get into the building;
now you have the key dont you?
good luck

In the room you opened with the Serenity Key, there's a plaque on the floor. Clicking it twice makes it slide back, revealing a hole. Jump down the hole, and you'll be next to the chest with the Helm.

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