The Secret of Sinchanee follows the story of Eric, an industrial tow truck driver who has been unable to sleep for months due to his insomnia. He receives a call from his sister informing him that their father has passed away and he must return to their childhood home to take care of the arrangements.
As Eric arrives at the house, he notices strange occurrences happening around him. He finds out that the house is built on sacred land that was once owned by an ancient Native American tribe. He soon discovers that a supernatural presence has been living in the house, and it seems to be connected to the land it was built on.
Eric begins to unravel the mystery of the paranormal presence that is haunting the house and the land. He delves into the history of the Native American tribe that once called this land their home and discovers a dark secret that has been hidden for centuries.
With the help of his sister and a local historian, Eric must uncover the truth behind the paranormal presence and put an end to its haunting once and for all. As he delves deeper into the mystery, he realizes that he might be in danger and that the secret of Sinchanee might be more dangerous than he ever imagined.