Paranormal Investigator Mateo Martinez travels the country(sometimes other countries) killing off demons,exercises vengeful spirits,and help ghosts cross over etc. But there is a small problem...she can't remember who she is and why she knows how to kill demons. Mateo travels the country to remember who she is and why was her memories taken,along with helping others on the way. Along with her friend Francis Kyle,they are off to discover the unknown. Mateo is one Lost Ghost.