When Moppy needs a spa day, Pierce is put in charge of running the M8 Mart. But there's only one rule - no monsters allowed!

Pimple escapes leaving the gang trapped in one of Helsing's bottles. The only way out is to confess their truths and shed their teenage insecurities.

As the gang hunt a Valentine's monster that feeds on love, Charlie experiences his first crush. Is it real or a clever monster in disguise?