Title: A Thousand Years of Coiling Desire

Logline: Two immortal snake women, Bai Suzhen (White Snake) and Qing Qing (Green Snake), weary of their ageless existence, seek a young man to grant Bai Suzhen the energy needed for divine ascension, entwining their destinies with his in a tale of love, sacrifice, and the seductive power of immortality.

Characters:

• Bai Suzhen (白素贞): A regal and elegant white snake, possessing immense power and a thousand years of wisdom. She is driven by a desire for immortality and views the young man as the key to achieving godhood. She is both alluring and calculating, capable of great tenderness but also ruthless in her pursuit of her goal.

• Qing Qing (青青): Bai Suzhen's mischievous and impulsive younger sister, a vibrant green snake. While initially skeptical of Bai Suzhen's plan, she becomes entangled in the scheme, her loyalty tested by her sister's ambition and the young man's charm. She acts as both a confidante and a foil to Bai Suzhen, offering a more playful and less calculating perspective.

• Xiao Lian (小莲): A kind and intelligent young man, perhaps a scholar or artist, unknowingly caught in the web of the snake women's desires. He possesses a rare and potent life force that Bai Suzhen needs. His innocence and compassion will be tested by the allure of the immortal sisters and the weight of their secret.

Setting: Ancient China, perhaps during the Song Dynasty. The story could unfold in a bustling city, a serene mountain village, or a mystical hidden valley. Locations could include ancient temples, bamboo forests, and flowing rivers, all imbued with a sense of mystery and ancient power.

Plot Points:

1. The Search: Bai Suzhen and Qing Qing, after centuries of searching, locate Xiao Lian, sensing his unique life energy. They begin subtly influencing his life, drawing him closer.

2. The Enchantment: Bai Suzhen uses her powers to subtly enchant Xiao Lian, creating a bond that is both alluring and subtly coercive. Qing Qing observes, torn between her loyalty to her sister and her growing concern for Xiao Lian.

3. The Revelation: Xiao Lian begins to suspect the true nature of the snake women, perhaps through strange occurrences or glimpses of their true forms. This leads to a period of conflict and uncertainty.

4. The Sacrifice: Bai Suzhen reveals her plan, explaining the need for Xiao Lian's energy to achieve godhood. This creates a moral dilemma for Xiao Lian, forcing him to choose between his own life and Bai Suzhen's ambition.

5. The Choice: Xiao Lian must decide whether to willingly sacrifice himself for Bai Suzhen, driven by love, pity, or a sense of duty. The consequences of his choice will determine the fate of all three characters.

6. The Transformation: Depending on Xiao Lian's choice, Bai Suzhen either achieves godhood, potentially at a great cost, or fails, leading to a different kind of resolution. Qing Qing's role in the outcome will be crucial.

7. The Aftermath: The story concludes with the exploration of the consequences of their actions, exploring themes of love, sacrifice, immortality, and the price of ambition. The ending could be bittersweet, tragic, or even hopeful, depending on the choices made.

Themes: Immortality, ambition, love, sacrifice, betrayal, the clash between the human and the supernatural, the seductive power of the unknown.

Possible Twists: Xiao Lian might possess unexpected powers of his own. Qing Qing might secretly plot against Bai Suzhen. The energy transfer might have unforeseen consequences for all involved. The pursuit of immortality might corrupt even the most virtuous characters.