Fox Searchlight has released the first trailer for its awards-season play Goodbye Christopher Robin, the origin story of Winnie The Pooh that traces the children’s classic’s creation by author A.A. Milne.

Domhnall Gleeson stars as Milne, whose experiences in World War I shaped the creation of the storybook bear and his friends, which Milne based on his son Christopher Robin’s toys. The enchanted tales brought hope and comfort to a battered England and a battered Milne after the war. The film also doesn’t shy away from his post-war PTSD — during that time, they called it being ‘shellshocked’ — and portrays the halting impact trauma can have on the psychology those who have seen combat (about 30% of combat veterans have been diagnosed with PTSD).

The Simon Curtis-directed pic also touches on the toll the books’ success had on Milne and his family — son (Will Tillson) and wife Daphne (Margot Robbie) were also thrust into the spotlight. Kelly Macdonald also stars.

Searchlight has set an October 13 release for the pic, which was penned by Frank Cottrell Boyce and Simon Vaughan. Damian Jones and Steve Christian produced.

Check out the trailer above.