A string of mysterious murders has unsettled the vampire community, initially appearing unrelated. Yet, each crime scene holds a card inscribed with "True of Vamp," connecting back to the legendary progenitor of all vampires. The Vlad Agency, a covert intelligence organization, recruits the esteemed aristocrat Dali Delico to head the investigation. At first, Dali declines, prioritizing his duties as a father. His former colleagues—Gerhard Fra, Henrique Lorca, and Dino Classico—persuade him to take the case while also lending a hand with childcare. Dali agrees on the condition that the three assist with parenting throughout the inquiry. Consequently, Dali's home becomes both a nursery and the primary operations hub for these four noble vampires. Meanwhile, a known criminal organization lurks in the shadows, plotting actions that could utterly devastate vampire society.
