Game of Thrones season 5: Arya Stark plotline heavily hinted at in new teaser clip

Maisie WIlliams is seen opening a mysterious black and white door...

Arya Stark is set for big changes in Game of Thrones season five, if the latest preview teaser is anything to by.

*This article contains possible spoilers*

The fantasy drama’s ThreeEyedRaven.com website dropped a new clip earlier today, showing Maisie Williams’ character potentially entering the House of Black and White from George RR Martin’s book series.

The brief trailer features flashbacks to Arya’s past scenes, including her killing a man and drawing a bow, before viewers see her open a black and white door.

If the HBO show is following Martin’s storyline, Arya will soon join famous assassin’s group the Faceless Men in foreign city Braavos, meaning her kill count might be about to rise.

Her former sword teacher Syrio Forel can be heard saying: “There is only one thing we say to death: Not today.” This may or may not signal the character’s return, after he was presumed to have died way back in series one.

Last month, Williams dropped a hint that next season would be “the end of Arya, as far as anyone knows”.

Game of Thrones will return on Sunday 12 April, before airing on Sky Atlantic the next day.

Williams can be seen in new Channel 4 thriller Cyberbully tonight, based on real life stories of internet bullying.