It's Valentines Day and everyone is celebrating by giving out meat valentines, but when a new girl named Tak arrives and starts giving out sausages, Zim believes she has a crush on him so he exploits the opportunity to examine human love rituals. However, when such doesn't turn out so well, he decides to head home, only to discover later that Tak followed him home and that she is actually a member of the Irken race. Tak plans to take over Zim's mission so she can show the Tallest that she is worthy of being an Invader, but that's not something Zim is going to permit so easily so he vows to prevent her from doing this, as the Earth is his planet to destroy.