Dragon Gate (2013)

Qiu Mo Yu is an agent assigned to protect the president's daughter. Her father is suspected of colluding against the president in a terrorist attack. She is determined to prove her father's innocence by investigating the disappearance of the president. She and her lover, Zhou Huai An tackle the case but get involved with some shady characters - Jin Xiang Yu, who is the lady boss of the underworld and Xiao Dao who is a cop that might've gone rogue. Mo Yu and Huai An find themselves getting deeper into something that they never expected.