a rather simplistic one : grief drives her , love drives him , and a second chance to find love in the most unlikely place 
(ROOT (NP (NP (DT a) (ADJP (RB rather) (JJ simplistic)) (NN one)) (: :) (S (S (NP (NN grief)) (VP (VBZ drives) (NP (PRP her)))) (, ,) (S (NP (NN love)) (VP (VBZ drives) (NP (PRP him)))) (, ,) (CC and) (NP (DT a) (JJ second) (NN chance) (S (VP (TO to) (VP (VB find) (NP (NN love)) (PP (IN in) (NP (DT the) (ADJP (RBS most) (JJ unlikely)) (NN place))))))))))
(ROOT (NP (NP (DT ) (ADJP (RB ) (JJ )) (NN )) (: ) (S (S (NP (NN )) (VP (VBZ ) (NP (PRP )))) (, ) (S (NP (NN )) (VP (VBZ ) (NP (PRP )))) (, ) (CC ) (NP (DT ) (JJ ) (NN ) (S (VP (TO ) (VP (VB ) (NP (NN )) (PP (IN ) (NP (DT ) (ADJP (RBS ) (JJ )) (NN ))))))))))