During the summer holiday Louis and his younger brother spend two weeks with their dad, who appears to have stopped drinking, but a close call with a bee sting brings their mother and the quartet spend a few days together before everything starts back up again.

Translation of: Louis parmi les spectres. "First published in French as Louis parmi les spectres in 2016 by Les Editions de la Pasteque, Montreal, Quebec."--Title page verso. "First published in English as Louis Undercover in Canada and the USA in 2017 by Groundwood Books."--Title page verso.