- "I want to tell you about this great new product. It will only take a minute of your time. I guarantee that you have never seen anything like this. At an estimated triple profit, hitting the market in two weeks, a revolutionary synthesised opioid offering security and versatility. Pills, patch, power, drugs. It's one hundred percent pure, one hundred percent of the time. Boasting a faster absorption rate at a slower metabolic rate. And the most exciting part...the CP-450 liver enzyme inhibitor. Which prevents the human body from ever building a tolerance to it. So, as you can see, the value of this particular heroin is unprecedented."
- ―Drug dealers explaining Steel Serpent
This section needs a rewrite
Deal with Fisk
Madame Gao became involved with Wilson Fisk and his criminal schemes, which saw her sending blind delivery people carrying backpacks with Steel Serpent to Vladimir and Anatoly Ranskahov often. The brothers would then take care of the heroin's distribution.
Betraying the Russians
Gao would later help Fisk in his war against Ranskahov and his men. The Russians received her blind workers as usual, but their backpacks were filled with explosives rather than heroin, and their facilities were blown up. After these series of explosions, Fisk took over the distribution of Steel Serpent.
Following the murder of Elena Cardenas, the man in the mask went after her assassin, a junkie who was given a supply of Steel Serpent in exchange for having taken care of her. He then decided to ask Ben Urich about the junkie's heroin, being told it was called Steel Serpent, the purest brand of heroin Urich had ever seen, and that blind workers were used to deliver it.
Murdock managed to locate and follow one of these deliverers to the warehouse Madame Gao used as her main facility and break in. He was terrified to find out about the dozens of blind people preparing the drugs for delivery, and was soon discovered by Madame Gao herself, who told her employees to attack him. Murdock went after Gao, but one of her guards accidently shot a flammable substance when trying to protect her, quickly setting the whole place on fire. After a brief dialogue with the masked man, Gao escaped, leaving him to evacuate the building. The police later investigated the burned warehouse and found out about the heroin and the illegal immigrants.
Daredevil and Madame Gao would meet again months later as he looked for the Blacksmith, a new drug dealer who had become her greatest rival in the market. She revealed to him that the Blacksmith had been threatening her work by eliminating her chemists, but also that she had many territories, with New York City being only one of them, before finally telling him to search for her enemy's ship in the docks.
Danny Rand retook his position as head of Rand Enterprises, Rand meditated and trained in his office when someone knocked on his office door. When he went and opened the door, no one was there except for a small red box. Rand look into the content, he found a message from Yang and a clue in a small packet of Steel Serpent. The message told him to start looking for The Hand. Rand recognized the mark on the drug as the symbol of Shou-Lao the Undying with its wings removed. Rand would come to believe that the Hand used this symbol as a way to mock K'un-Lun and the Iron Fist. 
Expanding the Trade
The next day, three business representatives of Madame Gao approached three separate dealers. They offered the Steel Serpent and explained the product, one of them even offering a junkie a sample in the form of a nicotine patch. The junkie explained that it was the best feeling he had ever had.
|Appearances for Steel Serpent|
In chronological order:
- In the comics, "Steel Serpent" is the major alias of Davos, the arch-nemesis of Iron Fist. The symbol on the Steel Serpent envelopes is the same Davos carries on his chest.
- ↑ Marvel's The Defenders postmortem: Showrunner answers burning questions
- ↑ Daredevil: 1.01: Into the Ring
- ↑ Daredevil: 1.05: World on Fire
- ↑ Daredevil: 1.12: The Ones We Leave Behind
- ↑ Daredevil: 2.11: .380
- ↑ Iron Fist: 1.04: Eight Diagram Dragon Palm
- ↑ Iron Fist: 1.08: The Blessing of Many Fractures
- ↑ Iron Fist: 1.05: Under Leaf Plock Lotus