I'm not sure specifically as I don't know this particular 'the river wild indian story'. It could be about the adventures of Indians near a wild river, like their hunting, fishing, or how they interact with the nature around the river.
Since I don't know the story well, it could be a young Indian brave who is on a journey along the river. Maybe an old shaman who has a deep connection with the river and its spirits.
It's not a true story. Usually, such works are created by the imagination of the writers or filmmakers to entertain and engage the audience. They might draw inspiration from various sources but not be based on actual happenings.
Wild River is purely fictional. The plot and characters were invented by the author or creators to entertain and engage the audience. There's no real-life basis for it.