Based on a true story, step inside the horror of one Brooklyn apartment in the mid-1970s. Ham and Von are best friends, and they believe they've found the opportunity of a lifetime—a cheap place to live in New York City. Mysteriously, the apartment has not been occupied in over forty years. They soon discover the reason for the vacancy: it is apparently inhabited by a ghost.

Once settled in to their new home, the boys begin to notice wild temperature changes and witness things flying around the room of their own accord. They decide to call in a white witch to learn more about the ghost by way of a late-night séance. But nothing is quite as it seems in New York of the seventies. Surrounded by a party mentality filled with drugs, sex, and music, the boys have trouble fighting whatever haunts their home.

Soon, a friend with possible good intentions begins experimenting with the Brazilian Old Religion, known as Macondo. Brutality breaks out in their once peaceful Brooklyn neighborhood. A beloved cat is donated to the white witch as a "familiar." The two find their lives have been rapidly turned upside-down.

Based on the actual experiences of author Dennis Doph, We Know Too Much is a story of terror, tough choices, and lasting friendships.