When Chlorine Everclean voluntarily takes her sister’s place in The 75th Periodic Games, hosts Titanium Alloy and Caesium Lepton are taken by surprise! Chlorine isn’t as strong a contender as her little sister Fluorine, and the other 17 tributes are fierce competition. In this first episode, we meet the tributes offered by every group of the periodic table as they prepare to do battle in the Laboratoria.