"I Wish I Knew" is a documentary that delves into the fascinating history of Shanghai, a city that has undergone rapid transformations since the mid-1800s. Through the personal experiences of 18 locals, including film director Hou Hsiao-Hsien, ex-soldiers, and criminals, the film tells stories of love,, revolution, and cultural upheaval. The documentary explores Shanghai's rich cultural heritage, including its architecture, which has been shaped by its status as a port city where people come and go. By weaving together these personal accounts and historical events, "I Wish I Knew" paints a vivid portrait of this captivating metropolis and its people.

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Some movies that have similar genres and were produced around the same time as I Wish I Knew include The Greatest Knight - William the Marshal, Killer Legends, The Diary of Anne Frank: A Tale of Two Sisters, Who Killed Nancy?, Jodorowsky's Dune, The Tents.

I Wish I Knew was released in theaters on March 12, 2011.