Everyone is enjoying the poolside sunshine, when they are stopped by an fast-advancing roar.
The wall of water engulfs everything in its wake, giving no time to escape, and bodies are flung in every direction beneath the water.
Survival will depend on good sense and a huge amount of good luck.
The family is split - Henry and the two youngest boys; Maria with Lucas.
Both parties must first reach high ground before another wave hits. Only then can they find medical aid.
The tsunami's incredible power and damaging force is brilliantly brought to screen and there is a real sense of knowing what went on during those dramatic minutes.
When Maria and Henry find safety, the focus turns to reuniting their family, if everyone is still alive.
With Maria fighting for her life in hospital, Henry scours medical and refugee centres looking for hope or answers.
There are some poignant moments as people from all walks of life seek answers to their missing loved ones.
There are moments of unbridled joy for reunited families, but there are many more moments of complete sorrow as reality bites.
The Impossible tackles the impact of this catastrophic day with sensitivity and compassion, while ensuring cinema-goers understand the true reality of the situation.
The Impossible
(M) 125 minutes
Rating: 4 / 5
