Two years have passed since Season 3 and our Lion Mums find themselves in very different circumstances. Durrani and Chae are in business together, Grace is determined to make the new school year drama free, and Min Yi is about to leave the bars behind.

When a recording of her standing up for migrant workers goes viral online, Durrani gets an interesting proposition. Min Yi struggles to adjust to her new normal and make up for lost time with Kai. Meanwhile, everyone at Charleston is talking about an enigmatic new student from America.

Durrani has big dreams of being a leader in the community but has second thoughts when she realises her privacy may be at stake. Min Yi tries to bond with Kai but realises he would rather spend time with Marcus. Reza struggles with the idea of installing a CCTV in the home.

Grace is introduced to Sandra's husband at the Charleston charity event only to be paralysed with fear when she realised who he is. Min Yi feels her authority as a parent is challenged by the people closest to her as she tries to discipline Kai. Durrani wants to start an ex-offender campaign and tri

Durrani gets frustrated when she is met with resistance from Min Yi who doesn't want to get involved in her Green Leaf project. Chae Lian tries to inject some romance back into her marriage. Grace has mixed feelings about getting too close to Sandra. Meanwhile, Nabilah's past experience comes back t

Durrani, Chae Lian and Min Yi deal with the unexpected personal and professional fallout from Durrani's press conference. Sex education sessions at Charleston surface unpleasant memories for Nabilah, and Grace is pulled into a difficult situation when a serious accusation is made. Meanwhile, Chae and Beng's different parenting styles make life complicated for Hillary.

Min Yi is left frustrated and helpless after an injury forces her to take leave from work - and puts her probation at risk. At Charleston, Grace tries to help Ruby after her stunning accusation, while Mrs Wang and Miss Sim's scheming leads to an unfortunate "accident". Margaret asks Chae for a new phone after her old model causes her to be left out at school.

Reza, Beng Hian and Marcus find themselves in the precarious position of trying to mend the ties between Min Yi and Durrani. Nabillah refuses to go for therapy to deal with her trauma from the past while Sandra deals with Ryan's problems by removing Ruby from Charleston. Min Yi looks for another job and is reluctant to accept the only position she is offered.

Durrani's petition takes off as she and Grace uncover more bombshells from KP Ho's past. Min Yi is working again and happy - until she learns Marcus has an admirer. Margaret has an interesting encounter at the supermarket. And as the cold war between Durrani and Min Yi continues, Chae tries a novel method to get her best friends back together.

The Lion Kids gear up for the Mid Year exams. Min Yi's new found success at work makes her enemies, and distracts her from Kai's attempts to get her attention at home. Durrani's campaign catches the attention of a national radio station, while Reza catches some unwanted online attention after Nabilah uploads a new video to her channel. Grace's secret is put at risk when Mrs Wang runs into Kyra at the mall.

After a visit with her doctor, Chae Lian decides to try an unconventional method to help with her condition. Min Yi works hard to impress her new boss but doesn't count on her being isolated by her colleagues. As an act of rebellion again his mother, Kai falls to peer pressure. Meanwhile, Grace makes a startling revelation about Sandra.

Min Yi discovers she's developing feelings for Marcus again. Reza finally makes headway in trying to repair his relationship with Nabilah. Chae Lian, busy with work as well as giving her best shot following the advice of the therapist to help her marriage, leaves her no time with Hillary who starts to feel the pressure of not doing as well as her older siblings in school.

Min Yi tries to find out how Marcus feels about her even after things get awkward between them. She also finds out that Kai has been telling her lies. Margaret and Lucas grow closer much to Amy's annoyance. Meanwhile, Nabilah gets uncomfortable seeing Ryan trying to get close to Jasmine. Chea Lian still cannot bring herself to tell Beng Hian about her condition even after a huge misunderstanding.

Min Yi gets a job offer which causes an even bigger riff between her, Kai and her parents. As the effects of Chae Lian's condition worsens and gets more noticeable, Durrani advises her to tell Beng Hian. A chance encounter between Grace and Ruby makes the former more determined to do the right thing, even if it means making a big sacrifice.

Margaret is left devastated after her big date doesn't go the way she planned. Min Yi takes a huge risk after a big job announcement to her family backfires. Nabilah finds herself in over her head as she tries to help a friend at school, while Hillary's stress eating intensifies. Meanwhile, Grace anxiously awaits the results of Kyra's DNA test.

Grace faces pressure to resign as the unthinkable comes to pass. Min Yi has to start over (again) as her professional and personal lives take a hit. Margaret falls victim to vicious rumours at school, and Nabilah takes her terrible secret to the only person she can trust.

After the devastating turn of events, Min Yi attempts to bury her feelings by staying in constant motion, much to the chagrin of her family members, while Chae finally reassesses her relationship with Beng Hian. A desperate Mrs Wang tries to pressure Miss Sim into giving Amos special attention before the examinations. Grace confronts Sandra about Ryan and issues her an ultimatum.

KP Ho begins a final, no-holds barred onslaught against Grace and Durrani, who must decide what they're willing to sacrifice in order to win. In the Lian household, Margaret seeks to repair her relationship with Lucas, while Chae helps Hillary manage her examination stress. Kai's friendship with the bad boys causes him to devise an alarming plan. An unwilling Miss Sim pushes Amos hard before his PSLE, ultimately driving him to make a disastrous

With days to go until PSLE, Grace is forced to deal with a police investigation when the fire is deemed suspicious. Eager to impress his friends, Kai pushes on with his dangerous plan. Min Yi decides it's time for some tough love and finds herself makingan unbearable sacrifice. Meanwhile, things are unravelling fast for Mrs Wang and Ms Sim.

The Lion Mums race to get their kids ready for the Big Day, and save their friend from a dire fate. Grace gets a grilling from the panel of inquiry, and is left with an agonising decision. Mrs Wang is flailing and out of options for Amos, when she gets a merciful reprieve she never could have expected. Kai takes a big risk to make things right, and the Lion kids pull together for the biggest examinations of their young lives.