"The Immortal Iron Fist" is a comic book series published by Marvel Comics, focusing on the character Danny Rand, who is the latest in a line of warriors to wield the mystical power of the Iron Fist. This power allows him to channel his chi, granting him enhanced strength and the ability to heal. The series explores his journey as he protects the mystical city of K'un-Lun and battles various foes. The storyline delves into the history of the Iron Fist legacy, introducing other characters like Orson Randall, a previous Iron Fist, and Colleen Wing, a skilled martial artist and Danny's ally. The series combines martial arts action with themes of honor, legacy, and the struggle between good and evil.