plot timeline for ppl who forgot about the plot (SPOLIERS)

i stole this from another a while back so kudos to them

In 1996, Kwon Jung-ae was teaching at Yewol Elementary School and helping Tae-kyung.
On August 11, 1997, Kwon Jung-ae killed Kim Taek-woo on Yewol Mountain and buried a "Caecilia" cross necklace nearby; Jung In-beom recorded a video of the body being buried.
That same year, Tae-kyung moved from the Liyue Orphanage to the House of Hope, and Kwon Jung-ae moved away from Yewol.
Between 2002 and 2004, Jung In-beom repeatedly blackmailed Kwon Jung-ae using the video and a letter containing evidence of the murder committed by Kwon Jung-ae and Han Seok-ju.
It is estimated that in 2003, Tae-kyung entered his first year of high school and was in the same class as Han Je-won.
It is estimated that in early 2004, Tae-kyung was adopted by Han Seok-ju (he reunited with Kwon Jung-ae and told her he now had a family).
In February 2004, Han Seok-ju asked Kwon Jung-woo for Kwon Jung-ae's address, claiming he was investigating a dangerous case.
On February 10, 2004, Tae-kyung went to the police station to ask if there had been any recent deaths; upon leaving, he saw his adoptive mother's car driving out from the direction of Migok Church. Kwon Jung-ae died in a fire, and Tae-kyung saved Hee-seo.
On March 31, 2004, Prosecutor Hwang Ji-yeon investigated the cause of the fire at Migok Church and privately assigned her junior colleague, Han Seok-ju, to handle the matter. Jung In-beom was investigated for blackmailing Kwon Jung-ae, and the correspondence between Kwon Jung-ae and Han Seok-ju was not returned.
In 2007, the first murder in the St. Veronica Orphanage serial killing case occurred.
In the winter of 2014, Tae-kyung and Hee-seo reunited. September 15, 2015: Han Seok-ju is diagnosed with breast cancer (though the diagnosis is questionable).
That same year, Tae-kyung learns of the existence of certain letters through a review of Jung In-beom’s records and discovers an "Agatha" necklace and letters hidden behind a mural at his foster mother's home. Hee-soo learns from Kwon Jung-woo that the prosecutor had been informed of her mother's whereabouts; meanwhile, a nun at Migok Church tells Tae-kyung that a man had once inquired about his mother while holding a "Caecilia" cross necklace—a name Tae-kyung later identifies as his mother's baptismal name via a church registry. Hee-soo subsequently leaves.
October 7, 2022: Han Seok-ju has recovered and is a strong contender for a seat on the council. Tae-kyung arranges to meet Jung In-beom, with Hee-soo tailing him; after Tae-kyung is knocked unconscious, Hee-soo grazes Jung In-beom’s arm with a pistol.
Eun-sung is assigned to the case; Jung In-beom has been fatally shot by an illegally modified shotgun. Eun-sung shares clues with Han Je-won. Han Je-won connects the dots—recalling the archery club, finding the club instructor, learning that Tae-kyung ran the "House of Hope" facility and was cared for by Kwon Jung-ae before that, identifying Hee-soo as Tae-kyung's mother, linking Kwon Jung-ae to St. Veronica High School, remembering the cross from childhood services with his mother, and realizing "Caecilia" is the password for Tae-kyung's encrypted file—and discovers a group photo from Veronica Orphanage where most faces have been crossed out.
October 22, 2022: Han Je-won tells Eun-sung the computer contains data related to Veronica Orphanage. Eun-sung reveals she is investigating a serial murder case linked to the orphanage; Jung In-beom was the final victim, and Tae-kyung—the first witness—is suspected of being held captive by the killer. Eun-sung asks for the file password, but Han Je-won withholds it.
Han Je-won finds a vehicle scrapping registration form for Han Se-hee’s car on his mother’s desk—dated the day after Tae-kyung went missing—and discovers a photo of Tae-kyung with an "X" marked over it inside a picture frame. After November 16, 2022, Hee-seo attended the acquisition of SH Cosmetic—a company in which Han Se-hee held shares—as the legal representative for Gretel Partners. Tae-kyung discovered a secret room containing a video on a computer that showed Han Seok-ju being kidnapped on the very day he had met with Jung In-beom.