Originally titled as Kung Kailangan Mo Ako, the murder mystery addresses issues affecting family relationships such as infidelity, mental illness, particularly schizophrenia and pathological lying.

The will stipulates Joseph must complete his education in the same private school as his brothers, and upon graduating university, share in the management of the company with Enzo.

Victor learns the truth when Dado secretly leaks the DNA result on his desk bureau for him to find, information that sparked his and Olivia's separation.

The coverup attempts lead to Chief investigator SPO1 Colminares' murder by Dado, creating an enormous impact on Calvin's mental state and he further regresses into Psychosis.

She is arrested for trying to abscond with company funds and Estafa charges are filed against her by BDG ("Buenavidez de Guzman Group").

The departure hold affects Calvin the hardest as his mental state deteriorates even further and his schizophrenic personalities begin to emerge.

Enzo's concern for Calvin increases and promises to be there for his brother but he is conflicted when he discovers more lies from his mother, her embezzlement of BDG funds.

Despite Olivia's courtroom triumphs, Calvin's mental health quickly deteriorates, his paranoia pushes him to break into Anthony's home.

This time, police focus on Calvin's alibi, Justine (Alexa Ilacad), threatening her with possible charges of obstruction of justice.

Meanwhile, Dado attempts to take matters in his own hands and kidnaps Calvin, a situation that forces Olivia to join him in a remote rural island in the province outside Manila where they live as a family.

Always the chronic liar, Olivia uses her self-inflicted wounds to describe abuse under the hands of Dado, a story the authorities and Enzo don't believe.

Joseph has similar suspicions and reports it to the police: all of them at the rooftop heard Dado threaten to expose the truth about Olivia if she and Calvin didn't go with him.

Enzo recognizes his mother's lies as the root of it all, and asks her how any resolution could occur if she can't face the truth.

Without Raquel's moral compass, particularly for her wayward son, Obet, the two boys are consumed with anger, cast adrift in an ocean of revenge, its currents controlled by a mentally ill Olivia.

Things all come to a head when he threatens to push Matilda from the top of the hospital exit stairwell, leading to his arrest.

Although the fiscal throws out the case for lack of probable cause, Arthur decides he has nothing to lose by revealing to the authorities his own bombshell: he colluded with Olivia to interfere with the investigation, that Olivia engaged his services not once but twice: first time was to lie about Raquel and implicate her in Victor's death which he refused, and the second time was to obtain evidence that she could use against Anthony in which he got paid.

Embarking on his own investigation, he starts in Anthony's home searching for any paper trail that would lead him to his uncle's last steps and shed light on what really happened to him, and why.

Meanwhile, Olivia finds Villamanca and roughs him up who eventually gives her access to the funds which Anthony had instructed to transfer back to Victor's company for his three sons to inherit.

Now suspecting that Joseph is sending the notes, Enzo and Obet follows him to the convent and a violent confrontation ensues culminating with a near tragic ending.

Despite Enzo's false confession to the authorities and risk to his future, Olivia continues to use legal due process while she surreptitiously arranges for new identification documents for her family to leave the country, which she plans to do as soon as she finds Calvin.

Enzo has an intense conversation with his mother when he shows her the audio recording and begs her to make things right, but Olivia vehemently denies everything.

Horrified at the turn of events, that her grandsons are suffering the most cruel punishment for their mother's sins, proves cathartic for Matilda who admits her hand in Olivia's abusive childhood, and her husband Enrico's cruelty towards their daughter created a selfish and mentally ill individual who sought to be loved manipulates and lies to survive.

Flashback scenes intersperse with present day, revealing Olivia's anger at discovering his plan, her slipping the poison into Victor's champagne, and her toast to him before he leaves their home, and it climaxes to his collapse and death.

The closing scene shows the four boys in front of the grave of Victor, sealing their relationship, with Obet as their Kuya, Calvin fully healed and all four ready to embark on their new lives as siblings.

Elmo Magalona and Janella Salvador were initially part of the original cast, but were eventually pulled out because of major changes to the storyline and production.

[24] The Good Son marks Joshua Garcia and Loisa Andalio's mini-reunion after previously being paired together in the reality show Pinoy Big Brother: All In in 2014; the two also reunites with Jerome Ponce after being worked together in the afternoon drama Nasaan Ka Nang Kailangan Kita in 2015.

Aguas, along with Eula Valdez, John Estrada, Albert Martinez and Liza Lorena, were previously part of the 2007 telenovela Maria Flordeluna.

Meanwhile, the series is also McCoy de Leon and Elisse Joson's first major project; the latter also reunites with Ponce after the closure of their relationship in Pinoy Big Brother Lucky Season 7.

In a last minute change, however, the series eventually replaces A Love to Last as part of Primetime Bida evening block due to the viewers' demanding requests.

[citation needed] The Good Son premiered in Kenya on November 19, 2018, replacing the one-month run of Muling Buksan ang Puso on NTV during the 6pm pre-primetime slot.