Tattooist Kant works as a spy for the police. When he's tasked to investigate a pair of gunman brothers, he finds that one of them is a one-night stand he hasn't been able to forget—Bison. The two assassins own a hamburger…
In the neon-lit underbelly of Bangkok, tattoo artist Kant leads a double life as a police informant. When he's tasked with infiltrating a pair of deadly hitman brothers who own a seemingly innocent hamburger shop, his mission takes a dangerously personal turn. The younger brother, Bison, is the same man Kant shared an unforgettable one-night stand with—and he can't shake the memory. Complicating matters further, Bison's older brother Fadel is a closed-off, hyper-vigilant killer who trusts no one. To get close to Fadel, Kant enlists his best friend Style, a sassy, crop-top-wearing auto mechanic with zero filter and a heart of gold. What begins as a high-stakes spy game quickly spirals into a chaotic, laugh-out-loud romantic comedy where bullets fly as fast as flirtatious banter. As Kant and Bison rekindle their explosive chemistry, Style's relentless pursuit cracks Fadel's icy exterior, revealing a vulnerable soul desperate for connection. But with lies piling up and danger closing in, both couples must decide: is love worth the ultimate betrayal? The Heart Killers blends adrenaline-pumping action, deliciously steamy romance, and genuinely hilarious moments into a wild ride that proves sometimes the deadliest hearts are the ones most worth breaking open. This is not your typical BL—it's a bold, stylish, and emotionally resonant drama about trust, redemption, and finding light in the darkest of places.