29-year-old Dr. Chiba Atsuko is a very charming beauty. She is also a humble and courteous psychotherapist who specializes in some fringe subjects in this field. Recently, her laboratory invented a new method of treating mental illness called PT. Through a very powerful device "DC-MINI", it can find the root causes of mental illness hidden in the patient's subconscious mind from dreams, and then carry out targeted treatment. "DC-MINI" was developed by Dr. Kosaku Tokida, a colleague in the laboratory and an outstanding scientist. He is an unsociable nerd who is only interested in food. However, this device can only have a positive effect in the hands of those who know how to use it. If it falls into the hands of someone with ulterior motives, it will have a devastating impact, because it can not only help repair the trauma of human subconsciousness, but also manipulate the memory and behavior of a sleeping person through dreams. With the help of "DC-MINI", Chiba Atsuko has a clone - the 18-year-old dream detective "Red Hot Chili Pepper". She is brave, fearless, clean and decisive, and has played a decisive role in treating patients in dreams several times. However, the most fearful thing is that three of the "DC-MINI" that were still in the experimental stage were stolen. Also missing with the devices was Dr. Kosaku Tokida's assistant Himuro Kei. This gave Atsuko reason to suspect that it was no coincidence. Since "DC-MINI" is still in the review stage and has not been approved for official use by the government, the theft of the device has brought inexplicable pressure to the entire laboratory. This incident is likely to prompt the government to issue an order to stop the operation of the entire project. What followed was even greater trouble. Several scientists involved in the research on this device in the laboratory went crazy one after another. Their symptoms were very consistent, that is, they still seemed to be in a dream when they were awake... They were all confused by a Japanese doll in their dreams, and this doll happened to often appear in the dreams of Himuro Kei who was responsible for treating a patient with schizophrenia. From this, Atsuko is convinced that whoever stole the "DC-MINI" must have an ulterior evil secret. Torataro Shima, the chairman of the laboratory, also began to be invaded by strange dreams, and even turned into committing suicide to end his life... Atsuko decided to personally investigate the truth of this series of mysterious events. A pattern on Kosaku Tokita's T-shirt inspired Atsuko to find the location of Himuro Kei, and transformed into "Red Pepper" and got into his dream. However, "Red Pepper" discovered that Himuro Keiya was just a puppet being manipulated. Since Shima Torataro has been unable to wake up from his sleep and is on the verge of death, Atsuko decides to take a desperate risk and enters Shima Torataro's chaotic dream as "Red Hot Chili Pepper". Finally, he discovers the real mastermind behind the scenes, which turns out to be another manager of their laboratory, Seijiro Iniki. At this time, the power of dreams was so powerful that it expanded into reality, and darkness began to devour the entire world. The incarnation of Jiro Seishi, the powerful "Dark Lord", also crossed over from dreams to reality. And "Red Pepper" also came out of the dream to fight side by side with Atsuko...