Of Land, Sea and Separation

57646 arrives on Sodor alone, believing 57647 dead. Meanwhile, Donald wants little to do with the struggling NWR and Douglas is saved from scrap by a kind Scottish preservationist. Douglas knows Sodor is on borrowed time and worries for his brother, an engine he knows only as six. A tale of 2 brothers, on 2 separate islands, in 2 separate countries. Will they see each other again?