It all began when a military operative and spy Mrs. Paraluman Buenaventura infiltrated a rebel camp up in the mountains. When her husband was able to raid the said camp, he was able to save two boys, whom he would eventually treat like his own sons. His only daughter, Estelle, was attracted to her new adoptive brother, Victor. However, he felt that loving him and being with him would endanger Estelle, so he kept his true feelings for her in the dark. Soon enough, their Secret Militia group, codenamed Trinity, has expanded to add more agents and fighters to their cause. Their arch-enemy, The Tribunal, will make themselves known, and it will cost Trinity several lives, including his surrogate mother Paraluman, whom Victor promises to avenge. Unknown to him, Estelle, as soon as she hit adulthood, had already started putting together a plan to have Victor accept her unrequited feelings. But would Victor ever do so and put his beloved Estelle in danger? What about his promise to avenge Paraluman?