Sa isang barkada, hindi mawawala ang outing pagdating nang bakasyon. Panahon na din para makapag-refresh ang mga utak matapos ang ilang buwang ginugol sa pag-aaral. Pero pano kung ang masaya pala nilang summer vacation ay biglang maging... huling summer na pala nila?

This is a book containing the events that we've come fronted in chronological order of their resolve.

Moving to Pampanga to start anew, Lorelei Rios only wants to focus on her new life and live in peace. But when she crosses paths with the ever-mysterious Loki Mendez, she's suddenly dragged into a world of mysteries, changing her life in ways she didn't expect. *** Joining a detective club is the last thing on high school student Lorelei Rios' mind. However, after being pressured into joining the QED Club by the cold and mysterious Loki Mendez, she unexpectedly finds herself solving mysteries one after another. As they tackle cases and work to decode puzzles and codes, Lorelei realizes that her high school life will never be the same. But when lives and safety are suddenly at risk, can Lorelei and Loki find the courage to face the challenges ahead? Or will their pasts impact their present, causing them to lose focus and ultimately fail?

The new semester opens with a bang that shocks the four Houses of QED University, an exclusive school for promising students of the science of deduction and art of detection. The Holmesian Harriet Harrison never thought that the day would come when their archnemesis Moriartian faction beat them in the House War. Her competitive attitude toward her class rival Morrie Moreno intensifies, each trying to outsmart and outmaneuver the other. But trouble does not stop there. The most charming Adlerian Aiden Alterra commits himself to a "secret mission" and starts pestering Harriet. The seemingly mute Wilhelmina Williams from the Watsonian faction also gets dragged along with the three in a string of mysterious incidents that will plague the university. Despite their dissenting motivations and unique personalities, the four will have no choice but to work together as a team toward one common goal and against one common enemy. The classes begin. Character illustrations by RAZE_DALI