@lekhoni_sadher story will start from when swayamver of draupadi started. From there everything will be same till Draupadi stopped Karna from completing the task by bringing his caste in between. On this, some Kauravas as well as Ashwathama got angry on Karna's insult whereas Shakuni reminds Draupadi that her father has invited Karna to participate in the Swayamver. Karna told his friends that he is going outside as he wants to spend some time alone which they agreed. When he reached out at the shore of Mata Ganga, where a portal opens in which he was sucked in. There portal opened in a Treta Yug near the shore of Mata Ganga and unconscious Karna came out. Some people took him to Ashram of Maharishi Valmiki. It is a time when Mata Sita was living in the Ashram due to the exile.