lose the plot
US /luːz ðə plɑt/
UK /luːz ðə plɑt/

1.
perder a cabeça, perder a noção, enlouquecer
to become unable to understand what is happening or to control your emotions
:
•
After working for 18 hours straight, I started to lose the plot.
Depois de trabalhar 18 horas seguidas, comecei a perder a cabeça.
•
The director seems to have lost the plot with this new movie.
O diretor parece ter perdido a noção com este novo filme.