Brussels.Leo,aSpanishmetrodriver,whileconductinghistrainandarrivingatastation,seesayoungmanindistressontheedgeoftheplatform.HerecognizeshissonHugorightbeforehefallsontotherailsandthendiesatthehospital.Leo,whohadnotseenhissonforyears,wi lldiscoverthatthewasinvolvedinabloodyheist.Whileonthetrailofhisson'smurderers,Leowillbecloselywatchedbythepolice,alsoinvestigating.TheywillsoondiscoverthatLeo'sskillsintrackingandapprehendingviolentcriminalsarenotthoseofameremetrodriver.