In the story of Project Arrhythmia you'll meet several characters. For this post we will be specifically looking at your friendly companion throughout the whole game, Anna Schroeder!
Anna (along with Hal) will guide you through the story that takes place inside the Arrhythmia Committee's supercomputer. Your goal is to research the cure to an extremely deadly disease currently plaguing humanity. Will you be able to find the cure in time?
You can read a bit more here, but beware of spoilers! http://tokyoflu.org