Isa ang Merton Academy sa mga kilalang paaralan sa buong Pilipinas. Karamihan sa mga nag-aaral dito ay mga kabataang may talento pagdating sa akademiko at mga laro. Ngunit may isang klase sa loob ng Merton Academy ang tinitingala ng lahat ng estudyante at iyon ang Class Zero. Sa klaseng ito ay nandito ang pinakamagagaling at pinakamatatalino sa lahat ng estudyante ng Merton Academy-Iyon ang akala ng lahat. Sa loob ng Class Zero ay may hiwagang nababalot ang bawat kabataan na nasa special program na ito. Tunay nga kayang mayroon silang angking talino at galing o may higit pang dahilan kung bakit nananatiling sikreto ang lahat ng pinag-aaralan sa Class Zero? Welcome to Class Zero! A special program for students who have special abilities! Once you became part of the class, there is one rule... you must keep everything in secret.

In the midst of solving mysteries and exploring their undeniable chemistry, Fifteen Salustiana is determined to help Xildius Vouganville confront his dark past and embrace the light once more. As they uncover the truth behind every crime, she must also seek the truth behind Xildius's fears. *** Desperate for money, Fifteen Salustiana takes a job as the personal assistant to the enigmatic Xildius Vouganville, or XV, a genius professor living in the eerie mansion of Villa Vouganville. XV, a master of anatomy and psychology, solves crimes from the shadows, haunted by a dark past that keeps him from stepping into the sunlight. Fifteen becomes XV's eyes and ears in the outside world, venturing out to gather clues and solve crimes. As they work together, she finds herself drawn to XV's brilliance and vulnerability. The more time they spend together, the more she realizes her feelings for him are growing stronger. Will Fifteen be able to help XV step out of the shadows and into the light, or will their love be consumed by the darkness? DISCLAIMER: This story is written in Taglish.