The document discusses costume and prop research and planning for a thriller film teaser. It explains that costumes will reflect the characters' personalities and moods. The main character has two personas - a normal college student and a murderous "devil." His normal costume will be casual, while his devil costume will be all black to disguise his identity. Props discussed include knives, blood, and scratchings to represent violence. The teaser will film scenes inside a bedroom and computer room to represent the character's nightmares and blog. Outdoor scenes will take place on the college grounds and in town to leave the devil's traces.