plot the variable and country borders

I have the netcdf file and want to plot a variable and country (Norway, Sweden, and Finland) borders on it.

Temp  = ncread('/Volumes/YKMac/TemperatureNSF.nc','ts');
figure(3);
h11=imagesc(rot90(Temp));axis on;grid;
set(h11,'alphadata',~isnan(rot90(Temp)));
set(gca,'color', [0.5 0.5 0.5]); %caxis([0 100]);
colormap(bluewhitered(256)); colorbar;
% Norway=shaperead('Norway.shp');
% yticklabels({'69','67','65','63','61','59','57','55'});
% xticklabels({'0','5','10','15','20','25','30','35'});
% ylabel('Lat');xlabel('Lon');
title('Temperature','fontsize',14);
set(gcf,'inverthardcopy',false);
saveas(gcf,'/Volumes/YKMac/Temperature.png');

The netcdf file and the plot is attached.