This is the second level in Year 7 Part 1 which takes place at the Ministry of Magic. The level is pretty straight-forward, but at the very end of the level there is a chase scene with Dementors.
In this part of the level is a Slytherin house crest to pick up as you are running, and getting it is a little tricky. It's behind a statue, and if you attempt to run in front of the statue you will miss it and have to do the level over again. Instead, run behind the statue and you will get the house crest. Don't be like me and play through that level more than 5 times just to miss it and have to do it again.