The main summary to Trolls is when the Bergen's invade the village where the troll lives and they took some of their friends and poppy is determined to get them back. Poppy and Branch go off to rescue their friends and during their adventure many tragic things happen such as one of their friends betray them to not be eaten. But good things also happen as well such as the trolls helping one Bergen fall in love with another one and in the end they save their friends and help the Bergen's learn to not eat trolls. The main message behind the Trolls movie is that how happiness can be found within which is what the Bergen's learn at the end but also overcoming your fears which is what one Bergen did with the help of the trolls.
:book