Witch's grace

In the series of houses, there stood a vacant house. It was made of stones arranged in a pretty thoughtful manner so that the pieces fit together, just like tetris. It had thatched roofing and clay tiled. On the front door, there marked a number with a white chalk, '13'.

“Is this the house?” Alex enquired.

“Should be. Number thirteen, same as the key number.” Leo said, looking at the key in his hand. 

“It's old and shabby.” Alex remarked, taking a gander at the house.

“We are in the medieval period Alex. What do you expect, a skyscraper?” Leo said, walking towards the main door and others followed him inspecting the stone house.

“Leo, let me open the lock.” Adi said with a timid grin, extending her hand towards him,