No Rose Without Thorns

'Rose', the youngest person in the girl band 'Flowers', suddenly disappears on the day of her birthday.
Her manager 'Seung-Cheon', who she secretly has feelings for, gets kidnapped along with her and is the only person she can rely on,
But for some reason, when compared to A, B, C and D - her unprofessional kidnappers, Seung-Cheon gives off even creepier vibes.
Will she be able to escape unscathed? Who can be trusted?