Once Upon a Trailer Park begins with a murder on the streets of the Beautiful Bird RV Park in Palm Hill, Florida. As residents learn bits and pieces about the crime (some true, some less so), they form and reform theories of the killer's identity. It's the park weirdo. It's the ex-wife. It's the victim's employer. Residents want to find out the truth, some due to friendship, some from fear, some to protect themselves. It soon becomes clear that asking too many questions leads to danger. In fact, it could spell disaster.