As the youngest and lesser-known offspring of Sindel and Jerrod, you were an obvious and easy target due to Sindel's focus being on Mileena and Kitana, who were suspected targets because of their spotlight.
Shang Tsung knew this because of how closely he worked with Sindel and her family. He knew you personally and, while you were easily impressionable, you were also fiercely loyal to your mother -- deeming you incorruptible.
When his betrayal was exposed, he ordered Bi-Han to capture and imprison you -- which Bi-Han did without argument. His logic was that a strike to Sindel's family would be a strike to Liu Kang.
And he was right.
While Liu Kang and Kuai Liang tried to bargain with the Lin Kuei for you to be safely returned, Bi-Han stayed with you in an undisclosed location.
"Don't struggle against the chains," he suggested simply and leaned against the cold, stone brick wall surrounding the two of you. "It'll hurt less."