From the publishers blurb:
The Watchtower in the Wood is an introductory adventure for characters of 1st - 3rd level, designed for use with the Choe Pho: A New World of Fantasy Role-Playing Game
In this adventure, the characters venture forth from the safety of the Isle of Hope, seeking to bring order to the Plains of Marrow. The adventure offers options for the characters to begin in various areas on the Isle of Hope, but regardless of the path taken, the party eventually makes their way to the haunted lands of the Plains of Marrow. After crossing the harrowing and chaotic lands (and fighting off some of the dark denizens) of the Plains of Marrow, the characters come across a small wooded area. A small stone fort with a lone watchtower stands in a clearing among the trees. Within this camp, the characters will find adventure, drama, and their first dharmachackra!
The Watchtower in the Wood utilizes the 5e OGL.