Chapter 13 - Subject S-4Sarah’s childhood file identified her as Harbor Subject S-4.
At age four, she developed a severe immune disorder after an unexplained infection. Her parents enrolled her in an experimental treatment program run by Helena Voss.
Sarah remembered hospitals.
White corridors.
A girl singing through a wall.
Her parents told her those memories came from fever.
The file showed another subject housed beside her.
M-4.
The girls shared nearly identical immune markers despite no recorded biological relationship.
Northstar transferred cells between them during an early version of the procedure later used on Emma and Lily.
M-4 disappeared from the records when Sarah turned seven.
Sarah’s condition stabilized.
Her parents moved the family out of Washington.
They never told her why.
Claire located Sarah’s surviving childhood guardian, Aunt Rebecca, in Oregon.
Rebecca admitted Sarah’s parents received money from Northstar and signed a lifetime confidentiality agreement.
“Who was M-4?” Sarah asked.
Rebecca began crying.
“Her name was Megan.”
Megan Price.
The yellow-coated school volunteer.
The Northstar coordinator declared dead eight years earlier.
She had been a child subject beside Sarah long before becoming a program employee.
“Was she my sister?”
“No.”
“Then why did we share cells?”
Rebecca did not know.
Sarah and Megan had become biologically linked through the treatment. Helena later recruited Megan by telling her that protecting Harbor was the only way to preserve the lives built from their shared research.
Megan saw Emma and Lily as continuations of herself and Sarah.
That explained why she entered the school.
Why she monitored both girls.
Why she spoke with Sarah’s old memories and mannerisms.
The substitute mother in the delivery-room photograph was Megan.
She had spent years learning Sarah’s identity.
“Where is she now?” Claire asked.
The ferry-terminal camera provided an answer.
Megan boarded a service boat with Dr. Bennett and the hidden twin.
The vessel headed toward an abandoned pediatric facility on Blake Island.
Daniel’s face appeared briefly in the cabin window.
All surviving Harbor factions were converging.
Sarah refused to remain at Harborview.
Emma’s condition had stabilized after the correct dose, but doctors warned that both twins might require coordinated treatment.
A medical team transported Emma under police protection to the island.
Michael traveled separately in custody as a cooperating witness.
Olivia joined only because her ring could unlock the original Harbor laboratory. She accepted that officers would monitor every movement.
The island facility stood beneath an old rehabilitation center surrounded by cedar forest.
Inside, Sarah found two pediatric beds prepared side by side.
One for Emma.
One for Lily.
Lily sat in the second bed with an IV line attached.
She looked at Sarah without warmth.
“You came.”
“Yes.”
“Did you come for me or because Emma needs me?”
Sarah did not lie.
“Both.”
Lily nodded.
“Everyone comes for both when they are afraid to choose.”
Sarah approached slowly.
“I am not asking you to give Emma anything.”
“Michael did.”
“I am not Michael.”
“Harbor says mothers always become the same under pressure.”
Sarah looked toward the observation glass where Helena stood behind Megan.
“Then Harbor will finally watch a mother refuse its question.”
She ordered the medical team to treat the girls independently.
Helena unlocked the intercom.
“You cannot separate them medically.”
“Then prove it without using one child as the other’s supply.”
Helena smiled faintly.
“That proof is why today was arranged.”
Sarah realized the school collapse had been engineered to bring Emma to Harborview, expose Michael, reactivate the family, and force everyone back to the island.
The harmful dose had not been an error.
It was an invitation.
Bennett emerged from the control room.
“I altered the dose.”
Sarah stared at him.
“Why?”
“To force an external toxicology panel. It was the only way to expose the compounds before Helena moved the girls again.”
“You nearly killed Emma.”
“I calculated a survivable concentration.”
Sarah crossed the room and struck him.
“You calculated with my child.”
Bennett did not defend himself.
Then Lily’s monitor alarmed.
Her blood pressure fell sharply.
Megan rushed toward the IV.
Emma cried out from the other bed at the exact same moment.
Both girls clutched their chests.
Helena watched the synchronized collapse with fascination.
“Now,” she whispered, “we finally learn whether the bond survives without the fathers.”
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The doors sealed.
👉 Helena had engineered both girls’ medical crises to complete the experiment she began with Sarah and Megan decades earlier.
