Roedd cariadon buarth yr ysgol, Cerys a Mark, i wrthdaro â'i gilydd mewn cariad cyntaf ffrwydrol. Dair blynedd ar ddeg yn ddiweddarach a bellach wedi gwahanu, maen nhw'n cymryd arnynt eu hunain i ymgymryd â seremoni ysgariad iachâd yn lle eu dyddiad cyntaf un, i gyd er mwyn eu merch yn ei harddegau, Ami. Neu o leiaf dyna beth maen nhw wedi'i ddweud wrth eu hunain.
Schoolyard sweethearts, Cerys and Mark, were destined to collide together in an explosive first love. Thirteen years on and now separated, they take it upon themselves to undertake a healing divorce ceremony at the place of their very first date, all for the sake of their teenage daughter, Ami. Or at least that's what they've told themselves.