could you please give the abstract of Avengers2 or help me translate the follwing sentence.Thanks!!!
《复仇者联盟2：奥创纪元》（Avengers: Age of Ultron）是漫威影业出品的一部科幻冒险电影，取材自漫威漫画，是漫威电影宇宙第11部电影。影片讲述当钢铁侠试图启动处于休眠状态的维持和平的项目时，事情出了差错。于是，在地球面临生死存亡的紧急关头时，强大的超级英雄们挺身而出承担起拯救世界的重任，他们将阻止可怕的人工智能机器人“奥创”制定恐怖计划。

Question

Answer

When Iron Man starts a peace keeping program, things go wrong, forcing him, Thor, The Incredible Hulk and all the other Avengers to join together again.
They are put to the ultimate test by an AI called Ultron trying to make humans extinct. Along the way they meet two powerful newcomers: Pietro and Wanda Maximoff.