Mo Chenyuan, once the strongest soldier who made his enemies fear him, was betrayed during a mission and was seriously injured. After that, he chose to retire and became a low-key security consultant. He thought his life would be spent in peace, but unexpectedly, during a protection mission, he met the rebellious and talented jewelry designer Su Qingyuan. Su Qingyuan was targeted by a transnational criminal group because of a mysterious ruby "Heart of Flame". Behind this ruby, there were secrets related to Mo Chenyuan's past.
In the thrilling pursuits and counterattacks, Mo Chenyuan's cold heart was melted by Su Qingyuan's warmth. Under Mo Chenyuan's protection, Su Qingyuan gradually saw clearly the gentleness under his hard shell. However, their emotional road is full of thorns, not only the deadly threat from the criminal group, but also the appearance of Mo Chenyuan's former comrade Lu Zhanchen. Lu Zhanchen was resentful of Mo Chenyuan's "betrayal" and tried to prevent him from regaining happiness. Love and hate are intertwined among the three, and the gears of fate are turning again. Can they protect each other in danger, uncover the secret of the "Blazing Heart", and find their own destination?
