What do u mean pls, story? or question?
Micaiah is one of the four disciples of Elijah. He told the prophesy that the battle Ahab wanted to enter would end poorly for Ahab. Sure enough Ahab dies in the battle.
The Mariner's spiritual rebirth begins when he falls asleep. This occurs in Part V, in the first stanza. He describes being wet and tired, but feeling awake, and lighter than he was before. He also mentions Mary, who is a spiritual figure herself, which shows the reader that this is the beginning of a spiritual moment in the poem.