Because of his 16-year career as a killing machine, U.S. Marine Corps veteran Cressai felt guilty about the massacre, and felt lifeless and drank heavily.
At that time, the kidnapping of rich children in Mexico City was common, sometimes several kidnappings a day, not only by the underworld, but also by law enforcement. Cresser travels to Mexico to visit friends and inadvertently becomes a bodyguard for sam's family, the factory owner, in charge of the safety of Sam's daughter Peeta.
Unable to shake off the past, Cressei finally grew tired of life, and one day, on a rainy night, the drunken Cressei pointed the gun at his head, but the "honest bullet" did not fire, and Heaven forgave him. In the night rain he saw in the opposite window, and Pitta was watching him.
In the later protection and protection, Cressei's cold heart was slowly melted by Pita's dependence and purity, and a smile slowly appeared on his face.
One day, the kidnapping came under the planning of many people, Cressei was seriously injured, and Pita was taken captive.
Because of the unspeakable conspiracy, there was an accident in the process of paying the ransom, and Sam did not redeem Pitta. Kidnappers tear up tickets.
Kressei heard the news, and after a brief treatment, he began his journey of revenge with the "art of killing" that he had been practicing for many years.
In the end, the Guardian exchanged his life for the life of an angel.

Guardian Cressei and Angel Pita
Guardians of self-blame and guilt
The First Sight of the Guardians and Angels
A small flower of the angel awakens the glorious humanity of the guardian, and behind the small flower is dependence and trust
Finally became friends
The moment she becomes an angel: Pita, who can escape, sees Cresser seriously injured and falls to the ground, and returns, crying, "I can't do it." Tears running...
Preparations before revenge
"All those involved in this kidnapping, all killed"
In exchange, Pitta shouted Cressei's name in a hoarse voice and ran to him
Pitta ran to his mother, and Cresser looked back at him. This goodbye will be a farewell.