Yusuke is a high school boy who accidentally died trying to save a young boy's life from a car accident. His spirit was assisted by Botan ( diety of death ) towards Rei kai ( spirit world ) for judgement. But due to the way Yusuke died, his spirit was sent back to Ningenkai ( Earth ) carrying an egg which Koenma ( son of the Rei Kai god ) gave him. Yusuke must do good deeds so that once the egg will hatch, it will become a good youkai. But if he fails to do so, the egg will hatch and become a monster that will eat Yusuke's spirit. While wandering around Yusuke's neighborhood with Botan, Yusuke realized that his rival, Kuwabara, is a kind-hearted , compassionate man and different from other people. By knowing so, Yusuke helped Kuwabara pass an important exam by helping Kuwabara review through his dream. Yusuke's body continues to breathe so Yusuke could go back if he's done with his assigned task. His body was resting in their house. Unfortunately, his house was burned down by someone and there's no one inside the house but the unconscious body of Yusuke. Keiko rushed towards Yusuke's house after knowing so, and brought his body to safety. Kuwabara also assisted her to safety. This rescue would not have been successful if it weren't for Yusuke. He used the power of the egg to save Keiko from the engulfing fire, but in exchange for this, he can never come back to his body again according to Botan. Then suddenly, Koenma appeared and told him that he was grateful to hear that he used the egg to save Keiko w/o hesitation. If he did not use the egg, it would grow as a youkai and will eat him anyways. One last thing must be done before Yusuke can go back; within 24 hours someone close to him must kiss him ( his body ) or he would be doomed as a spirit in another 50 years. Keiko and Kuwabara dreamt of this which was done on purpose by Botan and Yusuke. Kuwabara was disgusted with it and just ignored it. Keiko , knowing that it was just a dream, has other things to think about , particularly her mother who's sick in bed. Only 10 mins. left and still no one had kissed him. Botan used Keiko's ill mother to say the message about Yusuke. After hearing this, Keiko rushed to Yusuke's house and she saw Yusuke's body literally glowing. Keiko rushed towards his body and kissed him. She burst into tears of joy after she saw him get up. Well, he was revived. After being revived, Botan appeared and she told Yusuke that he was appointed as a detective ( tantei ) of Rei Kai by Koenma. From that point on is the beginning of his challenging journey towards his strange fate.
