This is episode 37 of 50 of Scent of Secrets. Play it below, then continue straight into the next episode — the whole season is free and needs no account.
The closing stretch of the season, where the arc pays off.
Su Meng is forbidden from her mother Lin Rou's perfume workshop, so she secretly investigates it. She discovers Lin Rou uses naturally scented workers to craft special perfumes amid business rivalries. Lin Rou eventually confesses, and mother and daughter unite to preserve their family legacy.