After witnessing the gruesome murder of her brother, police profiler Jennifer Peters (Justine Waddell) jumps at the chance to work the case of Kevin Parson (Marc Blucas), a naive college student who seems to be the next victim of the Riddle Killer - the same psychopath who killed her brother. The RK is unmerciful, calling with riddle after riddle and planting bomb after bombchallenging Kevin to figure out the riddles before innocent people die.When Kevin's childhood friend, Samantha re-enters his life to help protect him, the RK forces all three of them into the game. Up against a ticking clock, they are thrust toward the dark conclusion as Kevin's past comes into question; how much longer can they play this game before one, or all of them die?