▁with ▁a ▁face ▁mask ). ▁T ae ▁E un ▁seems ▁to ▁hold ▁rom antic ▁feelings ▁for ▁G hang ▁G won , ▁getting ▁je alous ▁when ▁he ▁car ries ▁Se ▁Ye on ▁and ▁tells ▁T ae ▁E un ▁to ▁run ▁while ▁esc aping ▁a ▁Tr ouble . ▁▁ ▁Kim ▁Y oon ▁Se ong ▁Kim ▁Y oon ▁Se ong ▁was ▁a ▁man ▁with ▁a ▁perfect ▁life : ▁a ▁job , ▁a ▁lov ing ▁wife , ▁and ▁a ▁daughter . ▁All ▁this ▁changes ▁when ▁one ▁day ▁he ▁turns ▁into ▁a ▁trace . ▁Being ▁a ▁law - ab iding ▁citiz en , ▁he ▁dec ides ▁to ▁leg ally ▁register ▁as ▁a ▁trace , ▁rather ▁than ▁hide ▁his ▁identity . ▁After ▁that ▁he ▁is ▁separated ▁from ▁his ▁family ▁who ▁are ▁taken ▁to ▁a ▁trace ▁facility ▁where ▁the ▁family ▁of ▁the ▁traces ▁are ▁taken . ▁When ▁he ▁is ▁not ▁able ▁to ▁contact ▁them ▁he ▁goes ▁to ▁the ▁facility ▁to ▁see ▁his ▁family ▁where ▁he ▁is ▁stopped ▁by ▁a ▁group ▁of ▁trace ▁gu ards ▁and ▁ch ased ▁where ▁he ▁meets ▁Je ong ▁He e ▁Sub ▁who ▁is ▁also ▁a ▁trace ▁trying ▁to ▁get ▁into ▁the ▁facility . ▁They ▁join ▁and ▁form ▁a ▁team ▁and ▁rec ruit ▁other ▁members . ▁They ▁succeed ▁in ▁entering ▁the ▁facility ▁where ▁Kim ▁Y un ▁Se ong ▁finds ▁the ▁family ▁of ▁the ▁traces ▁who ▁are ▁brought ▁there ▁are ▁used ▁for ▁experimental ▁purposes ▁and ▁killed . ▁▁ ▁Mor ri eno ah ▁Jin ▁As ▁a ▁child , ▁Jin ▁was ▁an ▁em otion less ▁trace ▁who ▁had ▁ide als