Poirot returns to his homeland for the first time since the war, but his former colleagues in Brussels have long memories and an old murder case that still needs solving.
muddle: to cause confusion in (someone or someone's mind) — often used as (be) muddled. a mind muddled by too much advice.
in the eye of my mind, I have never left | bestow
devotions, salve to insomnia
out of sight, out of mind | tussle
make a pig's ear of it: to do something badly, wrongly, or awkwardly: He's made a real pig's ear of that bookcase he was supposed to be making.