Late at night on the widow's walk, Jonah shares memories of his great-uncle Thomas—the lighthouse keeper who spent 32 years tending the Caulfield Point Light and never married. He reveals Thomas kept a journal, found in the attic after Jonah's father died.
Sisters read Thomas-Edith love letters spanning 1958-1963. Discover Edith was likely assaulted by Edward Cairn, forced to flee Bitter Harbor. Evidence suggests she was pregnant. Meanwhile Whitfield files development plans, lobbies local businesses, and plants favorable editorial.
Maren drives to Portland amid escalating media attacks. Receives historic preservation grant rejection citing contested ownership - Gerald Whitfield's advisory board influence. Emotional breakdown at gas station over systematic dismantling of support.
Thea discovers Grandmother Edith was a Harwood - the family that originally owned Cairnwood Manor. Sisters argue over whether to publish or protect the family secret. Nathaniel Cairn goes on TV weaponizing the Harwood connection. Gerald Whitfield calls suspiciously fast.
Eleanor calls demanding sisters sell and return to Boston. Reveals Whitfield contacted her first. Sloane and Caleb discuss his sacrifice of the Walsh & Hewitt opportunity. Eleanor drops David engagement news.
Maren visits Jonah on boat. Reveals her avoidance cost them: missed Heritage Defense Grant deadline. Pete Gagnon gets speaking role with own stake (commercial mooring rights). Jonah shows independent agency via fishing cooperative idea. Carl Nickerson introduced as third fisherman.
Six hours before the deadline, Maren and Sloane present to the estate trustees. Sloane argues the legal case; Maren presents the Cairn letters and community counter-offer of $4.637M. Judge Goldstein orders a 60-day hold pending investigation. Sisters embrace on courthouse steps.
The family gathers in the library. Maren presents the Cairn letters she found in the wall and proposes a dual-track strategy: Sloane files an emergency motion while Maren rallies the community for a counter-offer. Caleb reveals he and Pete Gagnon have organized a harbor trust with 43 families.
Sloane researches Whitfield Development, discovers pattern of coastal town displacement. Family meeting reveals marina permit and Whitfield's active moves in town. Sisters argue over approach - Sloane wants legal caution, Thea wants immediate exposure, Maren wants community action.
Maren receives Whitfield development offer. Seeds her core flaw: avoidance/conflict aversion. She hides the letter in a drawer, fails to push back on Gerald Whitfield's call, and omits threatening details from Jonah.
