It focuses on the story of L's early days and how he solves cases. In this novel, we see L's unique detective methods and his battle of wits against various criminals.
One possible fanfiction could be where Light is in the hospital due to an unexpected illness. Maybe he uses this time to plot his next moves in the Death Note world without arousing too much suspicion. He could be pretending to be weaker than he actually is while observing the people around him, looking for potential Kira supporters or enemies among the hospital staff and patients.
A 'death note light x oc fanfiction' often involves creating an original character (OC) and pairing them with Light from 'Death Note'. It can explore unique relationships and scenarios that didn't exist in the original story. For example, the OC might be someone who discovers Light's secret early on and has to decide whether to support him or expose him.