Barbara, Mick, Gordon and Jackie were rising stars in the 1980s who went on to have high profile careers. Now living in Bath together, there are secrets from the past which could threaten their comfortable existences.

On a surprise day out, the four friends are joined by their other housemate Frankie on a surprise hot air balloon trip. As they ascend above beautiful Bath, disaster strikes and suddenly the balloon lurches out of control. Panic rises and as the basket strains under the weight of the group, it dawns on them that they can't all survive.

A social media influencer elects to have plastic surgery at a clinic run by soon to be divorced couple Al and Mariel; After tragedy strikes, McDonald and Dodds are brought in to investigate the clinic and its staff.