At the laboratory, a dog named Six-Thirty senses the strong bond between two women, Elizabeth and Avery Parker.
Avery Parker holds Elizabeth close, sharing her persistent uncertainty about her son's past and adoptive family.
Avery reveals that she learned about Elizabeth's daughter Madeline's family tree project and subsequent connection to Avery's son, Wilson.
Madeline's letter provided enough details to help a private investigator uncover the truth about her and Wilson's connection.
Avery shows Elizabeth a faked death certificate, which began her journey of discovering her son's history.
Elizabeth inquires about Calvin's biological father, whom Avery reveals died of tuberculosis before Calvin was born, sharing a photo of him.
Avery recounts her past love affair with Calvin's father, including an accident that led to their meeting and romance.
Elizabeth and Avery bond over shared memories and the significance of the lab, where Elizabeth first met Calvin.
Avery expresses a desire to be part of Elizabeth's family, to which Elizabeth responds by acknowledging Avery as family.
Elizabeth and Avery are interrupted by Wilson returning to the lab, mentioning pressing business matters.
Avery reluctantly announces that she has to leave soon, but promises to return.
Elizabeth proposes a family dinner to include the extended family and friends, cementing their new family ties.
After everyone leaves, Elizabeth and the dog, Six-Thirty, prepare to resume work in the lab with the concept of abiogenesis, symbolizing the beginning of new life or the next chapter in their research.